<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
// +----------------------------------------------------------------------+
// | Akelos Framework - http://www.akelos.org                             |
// +----------------------------------------------------------------------+
// | Copyright (c) 2002-2006, Akelos Media, S.L.  & Bermi Ferrer Martinez |
// | Released under the GNU Lesser General Public License, see LICENSE.txt|
// +----------------------------------------------------------------------+

/**
 * @package ActiveSupport
 * @subpackage Utils
 * @author Bermi Ferrer <bermi a.t akelos c.om>
 * @author Vincent Blavet <vincent@blavet.net>
 * @copyright Copyright (c) 2002-2006, Akelos Media, S.L. http://www.akelos.org
 * @license GNU Lesser General Public License <http://www.gnu.org/copyleft/lesser.html>
 */


require_once 'PEAR.php';
// ----- Constants
define('AK_ZIP_READ_BLOCK_SIZE', 2048);
// ----- File list separator
define('AK_ZIP_SEPARATOR', ',');
// ----- Optional static temporary directory
//       By default temporary files are generated in the script current
//       path.
//       If defined :
//       - MUST BE terminated by a '/'.
//       - MUST be a valid, already created directory
//       Samples :
// define( 'AK_ZIP_TEMPORARY_DIR', '/temp/' );
// define( 'AK_ZIP_TEMPORARY_DIR', 'C:/Temp/' );
define('AK_ZIP_TEMPORARY_DIR', '');
// ----- Error codes
define('AK_ZIP_ERR_NO_ERROR', 0);
define('AK_ZIP_ERR_WRITE_OPEN_FAIL', -1);
define('AK_ZIP_ERR_READ_OPEN_FAIL', -2);
define('AK_ZIP_ERR_INVALID_PARAMETER', -3);
define('AK_ZIP_ERR_MISSING_FILE', -4);
define('AK_ZIP_ERR_FILENAME_TOO_LONG', -5);
define('AK_ZIP_ERR_INVALID_ZIP', -6);
define('AK_ZIP_ERR_BAD_EXTRACTED_FILE', -7);
define('AK_ZIP_ERR_DIR_CREATE_FAIL', -8);
define('AK_ZIP_ERR_BAD_EXTENSION', -9);
define('AK_ZIP_ERR_BAD_FORMAT', -10);
define('AK_ZIP_ERR_DELETE_FILE_FAIL', -11);
define('AK_ZIP_ERR_RENAME_FILE_FAIL', -12);
define('AK_ZIP_ERR_BAD_CHECKSUM', -13);
define('AK_ZIP_ERR_INVALID_AK_ZIP', -14);
define('AK_ZIP_ERR_MISSING_OPTION_VALUE', -15);
define('AK_ZIP_ERR_INVALID_PARAM_VALUE', -16);
// ----- Warning codes
define('AK_ZIP_WARN_NO_WARNING', 0);
define('AK_ZIP_WARN_FILE_EXIST', 1);
// ----- Methods parameters
define('AK_ZIP_PARAM_PATH', 'path');
define('AK_ZIP_PARAM_ADD_PATH', 'add_path');
define('AK_ZIP_PARAM_REMOVE_PATH', 'remove_path');
define('AK_ZIP_PARAM_REMOVE_ALL_PATH', 'remove_all_path');
define('AK_ZIP_PARAM_SET_CHMOD', 'set_chmod');
define('AK_ZIP_PARAM_EXTRACT_AS_STRING', 'extract_as_string');
define('AK_ZIP_PARAM_NO_COMPRESSION', 'no_compression');
define('AK_ZIP_PARAM_BY_NAME', 'by_name');
define('AK_ZIP_PARAM_BY_INDEX', 'by_index');
define('AK_ZIP_PARAM_BY_EREG', 'by_ereg');
define('AK_ZIP_PARAM_BY_PREG', 'by_preg');
define('AK_ZIP_PARAM_PRE_EXTRACT', 'callback_pre_extract');
define('AK_ZIP_PARAM_POST_EXTRACT', 'callback_post_extract');
define('AK_ZIP_PARAM_PRE_ADD', 'callback_pre_add');
define('AK_ZIP_PARAM_POST_ADD', 'callback_post_add');
/**
 * Class for manipulating zip archive files
 *
 * A class which provided common methods to manipulate ZIP formatted
 * archive files.
 * It provides creation, extraction, deletion and add features.
 *
 * @author   Vincent Blavet <vincent@blavet.net>
 * @version  $Revision: 1.6 $
 * @category Archive
 */

class AkZip
{
    /**
     * The filename of the zip archive.
     *
     * @var string Name of the Zip file
     */
    var $_zipname = '';
    /**
     * File descriptor of the opened Zip file.
     *
     * @var int Internal zip file descriptor
     */
    var $_zip_fd = 0;
    /**
     * @var int last error code
     */
    var $_error_code = 1;
    /**
     * @var string Last error description
     */
    var $_error_string = '';
    // {{{ constructor
    
    /**
     * AkZip Class constructor. This flavour of the constructor only
     * declare a new AkZip object, identifying it by the name of the
     * zip file.
     *
     * @param    string  $p_zipname  The name of the zip archive to create
     * @access public
     */
    
    function AkZip($p_zipname) 
    {
        // ----- Check the zlib
        if (!extension_loaded('zlib')) {
            PEAR::loadExtension('zlib');
        }
        if (!extension_loaded('zlib')) {
            die("The extension 'zlib' couldn't be found.\n"."Please make sure your version of PHP was built "."with 'zlib' support.\n");
            return false;
        }
        // ----- Set the attributes
        $this->_zipname = $p_zipname;
        $this->_zip_fd = 0;
        return;
    }
    // }}}
    // {{{ create()
    
    /**
     * This method creates a Zip Archive with the filename set with
     * the constructor.
     * The files and directories indicated in $p_filelist
     * are added in the archive.
     * When a directory is in the list, the directory and its content is added
     * in the archive.
     * The methods takes a variable list of parameters in $p_params.
     * The supported parameters for this method are :
     *   'add_path' : Add a path to the archived files.
     *   'remove_path' : Remove the specified 'root' path of the archived files.
     *   'remove_all_path' : Remove all the path of the archived files.
     *   'no_compression' : The archived files will not be compressed.
     *
     * @access public
     * @param  mixed  $p_filelist  The list of the files or folders to add.
     *                             It can be a string with filenames separated
     *                             by a comma, or an array of filenames.
     * @param  mixed  $p_params  An array of variable parameters and values.
     * @return mixed An array of file description on success,
     *               an error code on error
     */
    
    function create($p_filelist, $p_params = 0) 
    {
        $this->_errorReset();
        // ----- Set default values
        if ($p_params === 0) {
            $p_params = array();
        }
        if ($this->_check_parameters($p_params, array(
            'no_compression' => false,
            'add_path' => "",
            'remove_path' => "",
            'remove_all_path' => false
        )) != 1) {
            return 0;
        }
        // ----- Look if the $p_filelist is really an array
        $p_result_list = array();
        if (is_array($p_filelist)) {
            $v_result = $this->_create($p_filelist, $p_result_list, $p_params);
        }
        // ----- Look if the $p_filelist is a string
        else if (is_string($p_filelist)) {
            // ----- Create a list with the elements from the string
            $v_list = explode(AK_ZIP_SEPARATOR, $p_filelist);
            $v_result = $this->_create($v_list, $p_result_list, $p_params);
        }
        // ----- Invalid variable
        else {
            $this->_errorLog(AK_ZIP_ERR_INVALID_PARAMETER, 'Invalid variable type p_filelist');
            $v_result = AK_ZIP_ERR_INVALID_PARAMETER;
        }
        if ($v_result != 1) {
            return 0;
        }
        return $p_result_list;
    }
    // }}}
    // {{{ add()
    
    /**
     * This method add files or directory in an existing Zip Archive.
     * If the Zip Archive does not exist it is created.
     * The files and directories to add are indicated in $p_filelist.
     * When a directory is in the list, the directory and its content is added
     * in the archive.
     * The methods takes a variable list of parameters in $p_params.
     * The supported parameters for this method are :
     *   'add_path' : Add a path to the archived files.
     *   'remove_path' : Remove the specified 'root' path of the archived files.
     *   'remove_all_path' : Remove all the path of the archived files.
     *   'no_compression' : The archived files will not be compressed.
     *   'callback_pre_add' : A callback function that will be called before
     *                        each entry archiving.
     *   'callback_post_add' : A callback function that will be called after
     *                         each entry archiving.
     *
     * @access public
     * @param    mixed  $p_filelist  The list of the files or folders to add.
     *                               It can be a string with filenames separated
     *                               by a comma, or an array of filenames.
     * @param    mixed  $p_params  An array of variable parameters and values.
     * @return mixed An array of file description on success,
     *               0 on an unrecoverable failure, an error code is logged.
     */
    
    function add($p_filelist, $p_params = 0) 
    {
        $this->_errorReset();
        // ----- Set default values
        if ($p_params === 0) {
            $p_params = array();
        }
        if ($this->_check_parameters($p_params, array(
            'no_compression' => false,
            'add_path' => '',
            'remove_path' => '',
            'remove_all_path' => false,
            'callback_pre_add' => '',
            'callback_post_add' => ''
        )) != 1) {
            return 0;
        }
        // ----- Look if the $p_filelist is really an array
        $p_result_list = array();
        if (is_array($p_filelist)) {
            // ----- Call the create fct
            $v_result = $this->_add($p_filelist, $p_result_list, $p_params);
        }
        // ----- Look if the $p_filelist is a string
        else if (is_string($p_filelist)) {
            // ----- Create a list with the elements from the string
            $v_list = explode(AK_ZIP_SEPARATOR, $p_filelist);
            // ----- Call the create fct
            $v_result = $this->_add($v_list, $p_result_list, $p_params);
        }
        // ----- Invalid variable
        else {
            $this->_errorLog(AK_ZIP_ERR_INVALID_PARAMETER, "add() : Invalid variable type p_filelist");
            $v_result = AK_ZIP_ERR_INVALID_PARAMETER;
        }
        if ($v_result != 1) {
            return 0;
        }
        // ----- Return the result list
        return $p_result_list;
    }
    // }}}
    // {{{ listContent()
    
    /**
     * This method gives the names and properties of the files and directories
     * which are present in the zip archive.
     * The properties of each entries in the list are :
     *   filename : Name of the file.
     *              For create() or add() it's the filename given by the user.
     *              For an extract() it's the filename of the extracted file.
     *   stored_filename : Name of the file / directory stored in the archive.
     *   size : Size of the stored file.
     *   compressed_size : Size of the file's data compressed in the archive
     *                     (without the zip headers overhead)
     *   mtime : Last known modification date of the file (UNIX timestamp)
     *   comment : Comment associated with the file
     *   folder : true | false (indicates if the entry is a folder)
     *   index : index of the file in the archive (-1 when not available)
     *   status : status of the action on the entry (depending of the action) :
     *            Values are :
     *              ok : OK !
     *              filtered : the file/dir was not extracted (filtered by user)
     *              already_a_directory : the file can't be extracted because a
     *                                    directory with the same name already
     *                                    exists
     *              write_protected : the file can't be extracted because a file
     *                                with the same name already exists and is
     *                                write protected
     *              newer_exist : the file was not extracted because a newer
     *                            file already exists
     *              path_creation_fail : the file is not extracted because the
     *                                   folder does not exists and can't be
     *                                   created
     *              write_error : the file was not extracted because there was a
     *                            error while writing the file
     *              read_error : the file was not extracted because there was a
     *                           error while reading the file
     *              invalid_header : the file was not extracted because of an
     *                               archive format error (bad file header)
     * Note that each time a method can continue operating when there
     * is an error on a single file, the error is only logged in the file status.
     *
     * @access public
     * @return mixed An array of file description on success,
     *               0 on an unrecoverable failure, an error code is logged.
     */
    
    function listContent() 
    {
        $this->_errorReset();
        // ----- Check archive
        if (!$this->_checkFormat()) {
            return (0);
        }
        $v_list = array();
        if ($this->_list($v_list) != 1) {
            unset($v_list);
            return (0);
        }
        return $v_list;
    }
    // }}}
    // {{{ extract()
    
    /**
     * This method extract the files and folders which are in the zip archive.
     * It can extract all the archive or a part of the archive by using filter
     * feature (extract by name, by index, by ereg, by preg). The extraction
     * can occur in the current path or an other path.
     * All the advanced features are activated by the use of variable
     * parameters.
     * The return value is an array of entry descriptions which gives
     * information on extracted files (See listContent()).
     * The method may return a success value (an array) even if some files
     * are not correctly extracted (see the file status in listContent()).
     * The supported variable parameters for this method are :
     *   'add_path' : Path where the files and directories are to be extracted
     *   'remove_path' : First part ('root' part) of the memorized path
     *                   (if similar) to remove while extracting.
     *   'remove_all_path' : Remove all the memorized path while extracting.
     *   'extract_as_string' :
     *   'set_chmod' : After the extraction of the file the indicated mode
     *                 will be set.
     *   'by_name' : It can be a string with file/dir names separated by ',',
     *               or an array of file/dir names to extract from the archive.
     *   'by_index' : A string with range of indexes separated by ',',
     *                (sample "1,3-5,12").
     *   'by_ereg' : A regular expression (ereg) that must match the extracted
     *               filename.
     *   'by_preg' : A regular expression (preg) that must match the extracted
     *               filename.
     *   'callback_pre_extract' : A callback function that will be called before
     *                            each entry extraction.
     *   'callback_post_extract' : A callback function that will be called after
     *                            each entry extraction.
     *
     * @access public
     * @param    mixed  $p_params  An array of variable parameters and values.
     * @return mixed An array of file description on success,
     *               0 on an unrecoverable failure, an error code is logged.
     */
    
    function extract($p_params = 0) 
    {
        $this->_errorReset();
        // ----- Check archive
        if (!$this->_checkFormat()) {
            return (0);
        }
        // ----- Set default values
        if ($p_params === 0) {
            $p_params = array();
        }
        if ($this->_check_parameters($p_params, array(
            'extract_as_string' => false,
            'add_path' => '',
            'remove_path' => '',
            'remove_all_path' => false,
            'callback_pre_extract' => '',
            'callback_post_extract' => '',
            'set_chmod' => 0,
            'by_name' => '',
            'by_index' => '',
            'by_ereg' => '',
            'by_preg' => ''
        )) != 1) {
            return 0;
        }
        // ----- Call the extracting fct
        $v_list = array();
        if ($this->_extractByRule($v_list, $p_params) != 1) {
            unset($v_list);
            return (0);
        }
        return $v_list;
    }
    // }}}
    // {{{ delete()
    
    /**
     * This methods delete archive entries in the zip archive.
     * Notice that at least one filtering rule (set by the variable parameter
     * list) must be set.
     * Also notice that if you delete a folder entry, only the folder entry
     * is deleted, not all the files bellonging to this folder.
     * The supported variable parameters for this method are :
     *   'by_name' : It can be a string with file/dir names separated by ',',
     *               or an array of file/dir names to delete from the archive.
     *   'by_index' : A string with range of indexes separated by ',',
     *                (sample "1,3-5,12").
     *   'by_ereg' : A regular expression (ereg) that must match the extracted
     *               filename.
     *   'by_preg' : A regular expression (preg) that must match the extracted
     *               filename.
     *
     * @access public
     * @param    mixed  $p_params  An array of variable parameters and values.
     * @return mixed An array of file description on success,
     *               0 on an unrecoverable failure, an error code is logged.
     */
    
    function delete($p_params) 
    {
        $this->_errorReset();
        // ----- Check archive
        if (!$this->_checkFormat()) {
            return (0);
        }
        // ----- Set default values
        if ($this->_check_parameters($p_params, array(
            'by_name' => '',
            'by_index' => '',
            'by_ereg' => '',
            'by_preg' => ''
        )) != 1) {
            return 0;
        }
        // ----- Check that at least one rule is set
        if (($p_params['by_name'] == '') && ($p_params['by_index'] == '') && ($p_params['by_ereg'] == '') && ($p_params['by_preg'] == '')) {
            $this->_errorLog(AK_ZIP_ERR_INVALID_PARAMETER, 'At least one filtering rule must'.' be set as parameter');
            return 0;
        }
        // ----- Call the delete fct
        $v_list = array();
        if ($this->_deleteByRule($v_list, $p_params) != 1) {
            unset($v_list);
            return (0);
        }
        return $v_list;
    }
    // }}}
    // {{{ properties()
    
    /**
     * This method gives the global properties of the archive.
     *  The properties are :
     *    nb : Number of files in the archive
     *    comment : Comment associated with the archive file
     *    status : not_exist, ok
     *
     * @access public
     * @param    mixed  $p_params  {Description}
     * @return mixed An array with the global properties or 0 on error.
     */
    
    function properties() 
    {
        $this->_errorReset();
        // ----- Check archive
        if (!$this->_checkFormat()) {
            return (0);
        }
        // ----- Default properties
        $v_prop = array();
        $v_prop['comment'] = '';
        $v_prop['nb'] = 0;
        $v_prop['status'] = 'not_exist';
        // ----- Look if file exists
        if (@is_file($this->_zipname)) {
            // ----- Open the zip file
            if (($this->_zip_fd = @fopen($this->_zipname, 'rb')) == 0) {
                $this->_errorLog(AK_ZIP_ERR_READ_OPEN_FAIL, 'Unable to open archive \''.$this->_zipname.'\' in binary read mode');
                return 0;
            }
            // ----- Read the central directory informations
            $v_central_dir = array();
            if (($v_result = $this->_readEndCentralDir($v_central_dir)) != 1) {
                return 0;
            }
            $this->_closeFd();
            // ----- Set the user attributes
            $v_prop['comment'] = $v_central_dir['comment'];
            $v_prop['nb'] = $v_central_dir['entries'];
            $v_prop['status'] = 'ok';
        }
        return $v_prop;
    }
    // }}}
    // {{{ duplicate()
    
    /**
     * This method creates an archive by copying the content of an other one.
     * If the archive already exist, it is replaced by the new one without
     * any warning.
     *
     * @access public
     * @param  mixed  $p_archive  It can be a valid AkZip object or
     *                            the filename of a valid zip archive.
     * @return integer 1 on success, 0 on failure.
     */
    
    function duplicate($p_archive) 
    {
        $this->_errorReset();
        // ----- Look if the $p_archive is a AkZip object
        if ((is_object($p_archive)) && (strtolower(get_class($p_archive)) == 'archive_zip')) {
            $v_result = $this->_duplicate($p_archive->_zipname);
        }
        // ----- Look if the $p_archive is a string (so a filename)
        else if (is_string($p_archive)) {
            // ----- Check that $p_archive is a valid zip file
            // TBC : Should also check the archive format
            if (!is_file($p_archive)) {
                $this->_errorLog(AK_ZIP_ERR_MISSING_FILE, "No file with filename '".$p_archive."'");
                $v_result = AK_ZIP_ERR_MISSING_FILE;
            } else {
                $v_result = $this->_duplicate($p_archive);
            }
        }
        // ----- Invalid variable
        else {
            $this->_errorLog(AK_ZIP_ERR_INVALID_PARAMETER, "Invalid variable type p_archive_to_add");
            $v_result = AK_ZIP_ERR_INVALID_PARAMETER;
        }
        return $v_result;
    }
    // }}}
    // {{{ merge()
    
    /**
     *  This method merge a valid zip archive at the end of the
     *  archive identified by the AkZip object.
     *  If the archive ($this) does not exist, the merge becomes a duplicate.
     *  If the archive to add does not exist, the merge is a success.
     *
     * @access public
     * @param mixed $p_archive_to_add  It can be a valid AkZip object or
     *                                 the filename of a valid zip archive.
     * @return integer 1 on success, 0 on failure.
     */
    
    function merge($p_archive_to_add) 
    {
        $v_result = 1;
        $this->_errorReset();
        // ----- Check archive
        if (!$this->_checkFormat()) {
            return (0);
        }
        // ----- Look if the $p_archive_to_add is a AkZip object
        if ((is_object($p_archive_to_add)) && (strtolower(get_class($p_archive_to_add)) == 'archive_zip')) {
            $v_result = $this->_merge($p_archive_to_add);
        }
        // ----- Look if the $p_archive_to_add is a string (so a filename)
        else if (is_string($p_archive_to_add)) {
            // ----- Create a temporary archive
            $v_object_archive = new AkZip($p_archive_to_add);
            // ----- Merge the archive
            $v_result = $this->_merge($v_object_archive);
        }
        // ----- Invalid variable
        else {
            $this->_errorLog(AK_ZIP_ERR_INVALID_PARAMETER, "Invalid variable type p_archive_to_add");
            $v_result = AK_ZIP_ERR_INVALID_PARAMETER;
        }
        return $v_result;
    }
    // }}}
    // {{{ errorCode()
    
    /**
     * Method that gives the lastest error code.
     *
     * @access public
     * @return integer The error code value.
     */
    
    function errorCode() 
    {
        return ($this->_error_code);
    }
    // }}}
    // {{{ errorName()
    
    /**
     * This method gives the latest error code name.
     *
     * @access public
     * @param  boolean $p_with_code  If true, gives the name and the int value.
     * @return string The error name.
     */
    
    function errorName($p_with_code = false) 
    {
        $v_const_list = get_defined_constants();
        // ----- Extract error constants from all const.
        for (reset($v_const_list) ; list($v_key, $v_value) = each($v_const_list) ;) {
            if (substr($v_key, 0, strlen('AK_ZIP_ERR_')) == 'AK_ZIP_ERR_') {
                $v_error_list[$v_key] = $v_value;
            }
        }
        // ----- Search the name form the code value
        $v_key = array_search($this->_error_code, $v_error_list, true);
        if ($v_key != false) {
            $v_value = $v_key;
        } else {
            $v_value = 'NoName';
        }
        if ($p_with_code) {
            return ($v_value.' ('.$this->_error_code.')');
        } else {
            return ($v_value);
        }
    }
    // }}}
    // {{{ errorInfo()
    
    /**
     * This method returns the description associated with the latest error.
     *
     * @access public
     * @param  boolean $p_full If set to true gives the description with the
     *                         error code, the name and the description.
     *                         If set to false gives only the description
     *                         and the error code.
     * @return string The error description.
     */
    
    function errorInfo($p_full = false) 
    {
        if ($p_full) {
            return ($this->errorName(true) ." : ".$this->_error_string);
        } else {
            return ($this->_error_string." [code ".$this->_error_code."]");
        }
    }
    // }}}
    // -----------------------------------------------------------------------------
    // ***** UNDER THIS LINE ARE DEFINED PRIVATE INTERNAL FUNCTIONS *****
    // *****                                                        *****
    // *****       THESES FUNCTIONS MUST NOT BE USED DIRECTLY       *****
    // -----------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _checkFormat()
    // Description :
    //   This method check that the archive exists and is a valid zip archive.
    //   Several level of check exists. (futur)
    // Parameters :
    //   $p_level : Level of check. Default 0.
    //              0 : Check the first bytes (magic codes) (default value))
    //              1 : 0 + Check the central directory (futur)
    //              2 : 1 + Check each file header (futur)
    // Return Values :
    //   true on success,
    //   false on error, the error code is set.
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_checkFormat()
     *
     * { Description }
     *
     * @param integer $p_level
     */
    
    function _checkFormat($p_level = 0) 
    {
        $v_result = true;
        // ----- Reset the error handler
        $this->_errorReset();
        // ----- Look if the file exits
        if (!is_file($this->_zipname)) {
            // ----- Error log
            $this->_errorLog(AK_ZIP_ERR_MISSING_FILE, "Missing archive file '".$this->_zipname."'");
            return (false);
        }
        // ----- Check that the file is readeable
        if (!is_readable($this->_zipname)) {
            // ----- Error log
            $this->_errorLog(AK_ZIP_ERR_READ_OPEN_FAIL, "Unable to read archive '".$this->_zipname."'");
            return (false);
        }
        // ----- Check the magic code
        // TBC
        // ----- Check the central header
        // TBC
        // ----- Check each file header
        // TBC
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _create()
    // Description :
    // Parameters :
    // Return Values :
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_create()
     *
     * { Description }
     *
     */
    
    function _create($p_list, &$p_result_list, &$p_params) 
    {
        $v_result = 1;
        $v_list_detail = array();
        $p_add_dir = $p_params['add_path'];
        $p_remove_dir = $p_params['remove_path'];
        $p_remove_all_dir = $p_params['remove_all_path'];
        // ----- Open the file in write mode
        if (($v_result = $this->_openFd('wb')) != 1) {
            // ----- Return
            return $v_result;
        }
        // ----- Add the list of files
        $v_result = $this->_addList($p_list, $p_result_list, $p_add_dir, $p_remove_dir, $p_remove_all_dir, $p_params);
        // ----- Close
        $this->_closeFd();
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _add()
    // Description :
    // Parameters :
    // Return Values :
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_add()
     *
     * { Description }
     *
     */
    
    function _add($p_list, &$p_result_list, &$p_params) 
    {
        $v_result = 1;
        $v_list_detail = array();
        $p_add_dir = $p_params['add_path'];
        $p_remove_dir = $p_params['remove_path'];
        $p_remove_all_dir = $p_params['remove_all_path'];
        // ----- Look if the archive exists or is empty and need to be created
        if ((!is_file($this->_zipname)) || (filesize($this->_zipname) == 0)) {
            $v_result = $this->_create($p_list, $p_result_list, $p_params);
            return $v_result;
        }
        // ----- Open the zip file
        if (($v_result = $this->_openFd('rb')) != 1) {
            return $v_result;
        }
        // ----- Read the central directory informations
        $v_central_dir = array();
        if (($v_result = $this->_readEndCentralDir($v_central_dir)) != 1) {
            $this->_closeFd();
            return $v_result;
        }
        // ----- Go to beginning of File
        @rewind($this->_zip_fd);
        // ----- Creates a temporay file
        $v_zip_temp_name = AK_ZIP_TEMPORARY_DIR.uniqid('archive_zip-') .'.tmp';
        // ----- Open the temporary file in write mode
        if (($v_zip_temp_fd = @fopen($v_zip_temp_name, 'wb')) == 0) {
            $this->_closeFd();
            $this->_errorLog(AK_ZIP_ERR_READ_OPEN_FAIL, 'Unable to open temporary file \''.$v_zip_temp_name.'\' in binary write mode');
            return AkZip::errorCode();
        }
        // ----- Copy the files from the archive to the temporary file
        // TBC : Here I should better append the file and go back to erase the
        // central dir
        $v_size = $v_central_dir['offset'];
        while ($v_size != 0) {
            $v_read_size = ($v_size < AK_ZIP_READ_BLOCK_SIZE ? $v_size : AK_ZIP_READ_BLOCK_SIZE);
            $v_buffer = fread($this->_zip_fd, $v_read_size);
            @fwrite($v_zip_temp_fd, $v_buffer, $v_read_size);
            $v_size-= $v_read_size;
        }
        // ----- Swap the file descriptor
        // Here is a trick : I swap the temporary fd with the zip fd, in order to
        // use the following methods on the temporary fil and not the real archive
        $v_swap = $this->_zip_fd;
        $this->_zip_fd = $v_zip_temp_fd;
        $v_zip_temp_fd = $v_swap;
        // ----- Add the files
        $v_header_list = array();
        if (($v_result = $this->_addFileList($p_list, $v_header_list, $p_add_dir, $p_remove_dir, $p_remove_all_dir, $p_params)) != 1) {
            fclose($v_zip_temp_fd);
            $this->_closeFd();
            @unlink($v_zip_temp_name);
            // ----- Return
            return $v_result;
        }
        // ----- Store the offset of the central dir
        $v_offset = @ftell($this->_zip_fd);
        // ----- Copy the block of file headers from the old archive
        $v_size = $v_central_dir['size'];
        while ($v_size != 0) {
            $v_read_size = ($v_size < AK_ZIP_READ_BLOCK_SIZE ? $v_size : AK_ZIP_READ_BLOCK_SIZE);
            $v_buffer = @fread($v_zip_temp_fd, $v_read_size);
            @fwrite($this->_zip_fd, $v_buffer, $v_read_size);
            $v_size-= $v_read_size;
        }
        // ----- Create the Central Dir files header
        for ($i = 0, $v_count = 0 ; $i < sizeof($v_header_list) ; $i++) {
            // ----- Create the file header
            if ($v_header_list[$i]['status'] == 'ok') {
                if (($v_result = $this->_writeCentralFileHeader($v_header_list[$i])) != 1) {
                    fclose($v_zip_temp_fd);
                    $this->_closeFd();
                    @unlink($v_zip_temp_name);
                    // ----- Return
                    return $v_result;
                }
                $v_count++;
            }
            // ----- Transform the header to a 'usable' info
            $this->_convertHeader2FileInfo($v_header_list[$i], $p_result_list[$i]);
        }
        // ----- Zip file comment
        $v_comment = '';
        // ----- Calculate the size of the central header
        $v_size = @ftell($this->_zip_fd) -$v_offset;
        // ----- Create the central dir footer
        if (($v_result = $this->_writeCentralHeader($v_count+$v_central_dir['entries'], $v_size, $v_offset, $v_comment)) != 1) {
            // ----- Reset the file list
            unset($v_header_list);
            // ----- Return
            return $v_result;
        }
        // ----- Swap back the file descriptor
        $v_swap = $this->_zip_fd;
        $this->_zip_fd = $v_zip_temp_fd;
        $v_zip_temp_fd = $v_swap;
        // ----- Close
        $this->_closeFd();
        // ----- Close the temporary file
        @fclose($v_zip_temp_fd);
        // ----- Delete the zip file
        // TBC : I should test the result ...
        @unlink($this->_zipname);
        // ----- Rename the temporary file
        // TBC : I should test the result ...
        //@rename($v_zip_temp_name, $this->_zipname);
        $this->_tool_Rename($v_zip_temp_name, $this->_zipname);
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _openFd()
    // Description :
    // Parameters :
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_openFd()
     *
     * { Description }
     *
     */
    
    function _openFd($p_mode) 
    {
        $v_result = 1;
        // ----- Look if already open
        if ($this->_zip_fd != 0) {
            $this->_errorLog(AK_ZIP_ERR_READ_OPEN_FAIL, 'Zip file \''.$this->_zipname.'\' already open');
            return AkZip::errorCode();
        }
        // ----- Open the zip file
        if (($this->_zip_fd = @fopen($this->_zipname, $p_mode)) == 0) {
            $this->_errorLog(AK_ZIP_ERR_READ_OPEN_FAIL, 'Unable to open archive \''.$this->_zipname.'\' in '.$p_mode.' mode');
            return AkZip::errorCode();
        }
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _closeFd()
    // Description :
    // Parameters :
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_closeFd()
     *
     * { Description }
     *
     */
    
    function _closeFd() 
    {
        $v_result = 1;
        if ($this->_zip_fd != 0) @fclose($this->_zip_fd);
        $this->_zip_fd = 0;
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _addList()
    // Description :
    //   $p_add_dir and $p_remove_dir will give the ability to memorize a path which is
    //   different from the real path of the file. This is usefull if you want to have PclTar
    //   running in any directory, and memorize relative path from an other directory.
    // Parameters :
    //   $p_list : An array containing the file or directory names to add in the tar
    //   $p_result_list : list of added files with their properties (specially the status field)
    //   $p_add_dir : Path to add in the filename path archived
    //   $p_remove_dir : Path to remove in the filename path archived
    // Return Values :
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_addList()
     *
     * { Description }
     *
     */
    
    function _addList($p_list, &$p_result_list, $p_add_dir, $p_remove_dir, $p_remove_all_dir, &$p_params) 
    {
        $v_result = 1;
        // ----- Add the files
        $v_header_list = array();
        if (($v_result = $this->_addFileList($p_list, $v_header_list, $p_add_dir, $p_remove_dir, $p_remove_all_dir, $p_params)) != 1) {
            return $v_result;
        }
        // ----- Store the offset of the central dir
        $v_offset = @ftell($this->_zip_fd);
        // ----- Create the Central Dir files header
        for ($i = 0, $v_count = 0 ; $i < sizeof($v_header_list) ; $i++) {
            // ----- Create the file header
            if ($v_header_list[$i]['status'] == 'ok') {
                if (($v_result = $this->_writeCentralFileHeader($v_header_list[$i])) != 1) {
                    return $v_result;
                }
                $v_count++;
            }
            // ----- Transform the header to a 'usable' info
            $this->_convertHeader2FileInfo($v_header_list[$i], $p_result_list[$i]);
        }
        // ----- Zip file comment
        $v_comment = '';
        // ----- Calculate the size of the central header
        $v_size = @ftell($this->_zip_fd) -$v_offset;
        // ----- Create the central dir footer
        if (($v_result = $this->_writeCentralHeader($v_count, $v_size, $v_offset, $v_comment)) != 1) {
            // ----- Reset the file list
            unset($v_header_list);
            // ----- Return
            return $v_result;
        }
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _addFileList()
    // Description :
    //   $p_add_dir and $p_remove_dir will give the ability to memorize a path which is
    //   different from the real path of the file. This is usefull if you want to
    //   run the lib in any directory, and memorize relative path from an other directory.
    // Parameters :
    //   $p_list : An array containing the file or directory names to add in the tar
    //   $p_result_list : list of added files with their properties (specially the status field)
    //   $p_add_dir : Path to add in the filename path archived
    //   $p_remove_dir : Path to remove in the filename path archived
    // Return Values :
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_addFileList()
     *
     * { Description }
     *
     */
    
    function _addFileList($p_list, &$p_result_list, $p_add_dir, $p_remove_dir, $p_remove_all_dir, &$p_params) 
    {
        $v_result = 1;
        $v_header = array();
        // ----- Recuperate the current number of elt in list
        $v_nb = sizeof($p_result_list);
        // ----- Loop on the files
        for ($j = 0 ; ($j < count($p_list)) && ($v_result == 1) ; $j++) {
            // ----- Recuperate the filename
            $p_filename = $this->_tool_TranslateWinPath($p_list[$j], false);
            // ----- Skip empty file names
            if ($p_filename == "") {
                continue;
            }
            // ----- Check the filename
            if (!file_exists($p_filename)) {
                $this->_errorLog(AK_ZIP_ERR_MISSING_FILE, "File '$p_filename' does not exists");
                return AkZip::errorCode();
            }
            // ----- Look if it is a file or a dir with no all pathnre move
            if ((is_file($p_filename)) || ((is_dir($p_filename)) && !$p_remove_all_dir)) {
                // ----- Add the file
                if (($v_result = $this->_addFile($p_filename, $v_header, $p_add_dir, $p_remove_dir, $p_remove_all_dir, $p_params)) != 1) {
                    // ----- Return status
                    return $v_result;
                }
                // ----- Store the file infos
                $p_result_list[$v_nb++] = $v_header;
            }
            // ----- Look for directory
            if (is_dir($p_filename)) {
                // ----- Look for path
                if ($p_filename != ".") $v_path = $p_filename."/";
                else $v_path = "";
                // ----- Read the directory for files and sub-directories
                $p_hdir = opendir($p_filename);
                $p_hitem = readdir($p_hdir); // '.' directory
                $p_hitem = readdir($p_hdir); // '..' directory
                while ($p_hitem = readdir($p_hdir)) {
                    // ----- Look for a file
                    if (is_file($v_path.$p_hitem)) {
                        // ----- Add the file
                        if (($v_result = $this->_addFile($v_path.$p_hitem, $v_header, $p_add_dir, $p_remove_dir, $p_remove_all_dir, $p_params)) != 1) {
                            // ----- Return status
                            return $v_result;
                        }
                        // ----- Store the file infos
                        $p_result_list[$v_nb++] = $v_header;
                    }
                    // ----- Recursive call to _addFileList()
                    else {
                        // ----- Need an array as parameter
                        $p_temp_list[0] = $v_path.$p_hitem;
                        $v_result = $this->_addFileList($p_temp_list, $p_result_list, $p_add_dir, $p_remove_dir, $p_remove_all_dir, $p_params);
                        // ----- Update the number of elements of the list
                        $v_nb = sizeof($p_result_list);
                    }
                }
                // ----- Free memory for the recursive loop
                unset($p_temp_list);
                unset($p_hdir);
                unset($p_hitem);
            }
        }
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _addFile()
    // Description :
    // Parameters :
    // Return Values :
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_addFile()
     *
     * { Description }
     *
     */
    
    function _addFile($p_filename, &$p_header, $p_add_dir, $p_remove_dir, $p_remove_all_dir, &$p_params) 
    {
        $v_result = 1;
        if ($p_filename == "") {
            // ----- Error log
            $this->_errorLog(AK_ZIP_ERR_INVALID_PARAMETER, "Invalid file list parameter (invalid or empty list)");
            // ----- Return
            return AkZip::errorCode();
        }
        // ----- Calculate the stored filename
        $v_stored_filename = $p_filename;
        // ----- Look for all path to remove
        if ($p_remove_all_dir) {
            $v_stored_filename = basename($p_filename);
        }
        // ----- Look for partial path remove
        else if ($p_remove_dir != "") {
            if (substr($p_remove_dir, -1) != '/') $p_remove_dir.= "/";
            if ((substr($p_filename, 0, 2) == "./") || (substr($p_remove_dir, 0, 2) == "./")) {
                if ((substr($p_filename, 0, 2) == "./") && (substr($p_remove_dir, 0, 2) != "./")) $p_remove_dir = "./".$p_remove_dir;
                if ((substr($p_filename, 0, 2) != "./") && (substr($p_remove_dir, 0, 2) == "./")) $p_remove_dir = substr($p_remove_dir, 2);
            }
            $v_compare = $this->_tool_PathInclusion($p_remove_dir, $p_filename);
            if ($v_compare > 0)
            //      if (substr($p_filename, 0, strlen($p_remove_dir)) == $p_remove_dir)
            {
                if ($v_compare == 2) {
                    $v_stored_filename = "";
                } else {
                    $v_stored_filename = substr($p_filename, strlen($p_remove_dir));
                }
            }
        }
        // ----- Look for path to add
        if ($p_add_dir != "") {
            if (substr($p_add_dir, -1) == "/") $v_stored_filename = $p_add_dir.$v_stored_filename;
            else $v_stored_filename = $p_add_dir."/".$v_stored_filename;
        }
        // ----- Filename (reduce the path of stored name)
        $v_stored_filename = $this->_tool_PathReduction($v_stored_filename);
        /* filename length moved after call-back in release 1.3
        // ----- Check the path length
        if (strlen($v_stored_filename) > 0xFF)
        {
        // ----- Error log
        $this->_errorLog(-5, "Stored file name is too long (max. 255) : '$v_stored_filename'");
        
        // ----- Return
        return AkZip::errorCode();
        }
        */
        // ----- Set the file properties
        clearstatcache();
        $p_header['version'] = 20;
        $p_header['version_extracted'] = 10;
        $p_header['flag'] = 0;
        $p_header['compression'] = 0;
        $p_header['mtime'] = filemtime($p_filename);
        $p_header['crc'] = 0;
        $p_header['compressed_size'] = 0;
        $p_header['size'] = filesize($p_filename);
        $p_header['filename_len'] = strlen($p_filename);
        $p_header['extra_len'] = 0;
        $p_header['comment_len'] = 0;
        $p_header['disk'] = 0;
        $p_header['internal'] = 0;
        $p_header['external'] = (is_file($p_filename) ? 0xFE49FFE0 : 0x41FF0010);
        $p_header['offset'] = 0;
        $p_header['filename'] = $p_filename;
        $p_header['stored_filename'] = $v_stored_filename;
        $p_header['extra'] = '';
        $p_header['comment'] = '';
        $p_header['status'] = 'ok';
        $p_header['index'] = -1;
        // ----- Look for pre-add callback
        if ((isset($p_params[AK_ZIP_PARAM_PRE_ADD])) && ($p_params[AK_ZIP_PARAM_PRE_ADD] != '')) {
            // ----- Generate a local information
            $v_local_header = array();
            $this->_convertHeader2FileInfo($p_header, $v_local_header);
            // ----- Call the callback
            // Here I do not use call_user_func() because I need to send a reference to the
            // header.
            eval('$v_result = '.$p_params[AK_ZIP_PARAM_PRE_ADD].'(AK_ZIP_PARAM_PRE_ADD, $v_local_header);');
            if ($v_result == 0) {
                // ----- Change the file status
                $p_header['status'] = "skipped";
                $v_result = 1;
            }
            // ----- Update the informations
            // Only some fields can be modified
            if ($p_header['stored_filename'] != $v_local_header['stored_filename']) {
                $p_header['stored_filename'] = $this->_tool_PathReduction($v_local_header['stored_filename']);
            }
        }
        // ----- Look for empty stored filename
        if ($p_header['stored_filename'] == "") {
            $p_header['status'] = "filtered";
        }
        // ----- Check the path length
        if (strlen($p_header['stored_filename']) > 0xFF) {
            $p_header['status'] = 'filename_too_long';
        }
        // ----- Look if no error, or file not skipped
        if ($p_header['status'] == 'ok') {
            // ----- Look for a file
            if (is_file($p_filename)) {
                // ----- Open the source file
                if (($v_file = @fopen($p_filename, "rb")) == 0) {
                    $this->_errorLog(AK_ZIP_ERR_READ_OPEN_FAIL, "Unable to open file '$p_filename' in binary read mode");
                    return AkZip::errorCode();
                }
                if ($p_params['no_compression']) {
                    // ----- Read the file content
                    $v_content_compressed = @fread($v_file, $p_header['size']);
                    // ----- Calculate the CRC
                    $p_header['crc'] = crc32($v_content_compressed);
                } else {
                    // ----- Read the file content
                    $v_content = @fread($v_file, $p_header['size']);
                    // ----- Calculate the CRC
                    $p_header['crc'] = crc32($v_content);
                    // ----- Compress the file
                    $v_content_compressed = gzdeflate($v_content);
                }
                // ----- Set header parameters
                $p_header['compressed_size'] = strlen($v_content_compressed);
                $p_header['compression'] = 8;
                // ----- Call the header generation
                if (($v_result = $this->_writeFileHeader($p_header)) != 1) {
                    @fclose($v_file);
                    return $v_result;
                }
                // ----- Write the compressed content
                $v_binary_data = pack('a'.$p_header['compressed_size'], $v_content_compressed);
                @fwrite($this->_zip_fd, $v_binary_data, $p_header['compressed_size']);
                // ----- Close the file
                @fclose($v_file);
            }
            // ----- Look for a directory
            else {
                // ----- Set the file properties
                $p_header['filename'].= '/';
                $p_header['filename_len']++;
                $p_header['size'] = 0;
                $p_header['external'] = 0x41FF0010; // Value for a folder : to be checked
                // ----- Call the header generation
                if (($v_result = $this->_writeFileHeader($p_header)) != 1) {
                    return $v_result;
                }
            }
        }
        // ----- Look for pre-add callback
        if ((isset($p_params[AK_ZIP_PARAM_POST_ADD])) && ($p_params[AK_ZIP_PARAM_POST_ADD] != '')) {
            // ----- Generate a local information
            $v_local_header = array();
            $this->_convertHeader2FileInfo($p_header, $v_local_header);
            // ----- Call the callback
            // Here I do not use call_user_func() because I need to send a reference to the
            // header.
            eval('$v_result = '.$p_params[AK_ZIP_PARAM_POST_ADD].'(AK_ZIP_PARAM_POST_ADD, $v_local_header);');
            if ($v_result == 0) {
                // ----- Ignored
                $v_result = 1;
            }
            // ----- Update the informations
            // Nothing can be modified
            
        }
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _writeFileHeader()
    // Description :
    // Parameters :
    // Return Values :
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_writeFileHeader()
     *
     * { Description }
     *
     */
    
    function _writeFileHeader(&$p_header) 
    {
        $v_result = 1;
        // TBC
        //for(reset($p_header); $key = key($p_header); next($p_header)) {
        //}
        // ----- Store the offset position of the file
        $p_header['offset'] = ftell($this->_zip_fd);
        // ----- Transform UNIX mtime to DOS format mdate/mtime
        $v_date = getdate($p_header['mtime']);
        $v_mtime = ($v_date['hours']<<11) +($v_date['minutes']<<5) +$v_date['seconds']/2;
        $v_mdate = (($v_date['year']-1980) <<9) +($v_date['mon']<<5) +$v_date['mday'];
        // ----- Packed data
        $v_binary_data = pack("VvvvvvVVVvv", 0x04034b50, $p_header['version'], $p_header['flag'], $p_header['compression'], $v_mtime, $v_mdate, $p_header['crc'], $p_header['compressed_size'], $p_header['size'], strlen($p_header['stored_filename']) , $p_header['extra_len']);
        // ----- Write the first 148 bytes of the header in the archive
        fputs($this->_zip_fd, $v_binary_data, 30);
        // ----- Write the variable fields
        if (strlen($p_header['stored_filename']) != 0) {
            fputs($this->_zip_fd, $p_header['stored_filename'], strlen($p_header['stored_filename']));
        }
        if ($p_header['extra_len'] != 0) {
            fputs($this->_zip_fd, $p_header['extra'], $p_header['extra_len']);
        }
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _writeCentralFileHeader()
    // Description :
    // Parameters :
    // Return Values :
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_writeCentralFileHeader()
     *
     * { Description }
     *
     */
    
    function _writeCentralFileHeader(&$p_header) 
    {
        $v_result = 1;
        // TBC
        //for(reset($p_header); $key = key($p_header); next($p_header)) {
        //}
        // ----- Transform UNIX mtime to DOS format mdate/mtime
        $v_date = getdate($p_header['mtime']);
        $v_mtime = ($v_date['hours']<<11) +($v_date['minutes']<<5) +$v_date['seconds']/2;
        $v_mdate = (($v_date['year']-1980) <<9) +($v_date['mon']<<5) +$v_date['mday'];
        // ----- Packed data
        $v_binary_data = pack("VvvvvvvVVVvvvvvVV", 0x02014b50, $p_header['version'], $p_header['version_extracted'], $p_header['flag'], $p_header['compression'], $v_mtime, $v_mdate, $p_header['crc'], $p_header['compressed_size'], $p_header['size'], strlen($p_header['stored_filename']) , $p_header['extra_len'], $p_header['comment_len'], $p_header['disk'], $p_header['internal'], $p_header['external'], $p_header['offset']);
        // ----- Write the 42 bytes of the header in the zip file
        fputs($this->_zip_fd, $v_binary_data, 46);
        // ----- Write the variable fields
        if (strlen($p_header['stored_filename']) != 0) {
            fputs($this->_zip_fd, $p_header['stored_filename'], strlen($p_header['stored_filename']));
        }
        if ($p_header['extra_len'] != 0) {
            fputs($this->_zip_fd, $p_header['extra'], $p_header['extra_len']);
        }
        if ($p_header['comment_len'] != 0) {
            fputs($this->_zip_fd, $p_header['comment'], $p_header['comment_len']);
        }
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _writeCentralHeader()
    // Description :
    // Parameters :
    // Return Values :
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_writeCentralHeader()
     *
     * { Description }
     *
     */
    
    function _writeCentralHeader($p_nb_entries, $p_size, $p_offset, $p_comment) 
    {
        $v_result = 1;
        // ----- Packed data
        $v_binary_data = pack("VvvvvVVv", 0x06054b50, 0, 0, $p_nb_entries, $p_nb_entries, $p_size, $p_offset, strlen($p_comment));
        // ----- Write the 22 bytes of the header in the zip file
        fputs($this->_zip_fd, $v_binary_data, 22);
        // ----- Write the variable fields
        if (strlen($p_comment) != 0) {
            fputs($this->_zip_fd, $p_comment, strlen($p_comment));
        }
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _list()
    // Description :
    // Parameters :
    // Return Values :
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_list()
     *
     * { Description }
     *
     */
    
    function _list(&$p_list) 
    {
        $v_result = 1;
        // ----- Open the zip file
        if (($this->_zip_fd = @fopen($this->_zipname, 'rb')) == 0) {
            // ----- Error log
            $this->_errorLog(AK_ZIP_ERR_READ_OPEN_FAIL, 'Unable to open archive \''.$this->_zipname.'\' in binary read mode');
            // ----- Return
            return AkZip::errorCode();
        }
        // ----- Read the central directory informations
        $v_central_dir = array();
        if (($v_result = $this->_readEndCentralDir($v_central_dir)) != 1) {
            return $v_result;
        }
        // ----- Go to beginning of Central Dir
        @rewind($this->_zip_fd);
        if (@fseek($this->_zip_fd, $v_central_dir['offset'])) {
            // ----- Error log
            $this->_errorLog(AK_ZIP_ERR_INVALID_AK_ZIP, 'Invalid archive size');
            // ----- Return
            return AkZip::errorCode();
        }
        // ----- Read each entry
        for ($i = 0 ; $i < $v_central_dir['entries'] ; $i++) {
            // ----- Read the file header
            if (($v_result = $this->_readCentralFileHeader($v_header)) != 1) {
                return $v_result;
            }
            $v_header['index'] = $i;
            // ----- Get the only interesting attributes
            $this->_convertHeader2FileInfo($v_header, $p_list[$i]);
            unset($v_header);
        }
        // ----- Close the zip file
        $this->_closeFd();
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _convertHeader2FileInfo()
    // Description :
    //   This function takes the file informations from the central directory
    //   entries and extract the interesting parameters that will be given back.
    //   The resulting file infos are set in the array $p_info
    //     $p_info['filename'] : Filename with full path. Given by user (add),
    //                           extracted in the filesystem (extract).
    //     $p_info['stored_filename'] : Stored filename in the archive.
    //     $p_info['size'] = Size of the file.
    //     $p_info['compressed_size'] = Compressed size of the file.
    //     $p_info['mtime'] = Last modification date of the file.
    //     $p_info['comment'] = Comment associated with the file.
    //     $p_info['folder'] = true/false : indicates if the entry is a folder or not.
    //     $p_info['status'] = status of the action on the file.
    // Parameters :
    // Return Values :
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_convertHeader2FileInfo()
     *
     * { Description }
     *
     */
    
    function _convertHeader2FileInfo($p_header, &$p_info) 
    {
        $v_result = 1;
        // ----- Get the interesting attributes
        $p_info['filename'] = $p_header['filename'];
        $p_info['stored_filename'] = $p_header['stored_filename'];
        $p_info['size'] = $p_header['size'];
        $p_info['compressed_size'] = $p_header['compressed_size'];
        $p_info['mtime'] = $p_header['mtime'];
        $p_info['comment'] = $p_header['comment'];
        $p_info['folder'] = (($p_header['external']&0x00000010) == 0x00000010);
        $p_info['index'] = $p_header['index'];
        $p_info['status'] = $p_header['status'];
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _extractByRule()
    // Description :
    //   Extract a file or directory depending of rules (by index, by name, ...)
    // Parameters :
    //   $p_file_list : An array where will be placed the properties of each
    //                  extracted file
    //   $p_path : Path to add while writing the extracted files
    //   $p_remove_path : Path to remove (from the file memorized path) while writing the
    //                    extracted files. If the path does not match the file path,
    //                    the file is extracted with its memorized path.
    //                    $p_remove_path does not apply to 'list' mode.
    //                    $p_path and $p_remove_path are commulative.
    // Return Values :
    //   1 on success,0 or less on error (see error code list)
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_extractByRule()
     *
     * { Description }
     *
     */
    
    function _extractByRule(&$p_file_list, &$p_params) 
    {
        $v_result = 1;
        $p_path = $p_params['add_path'];
        $p_remove_path = $p_params['remove_path'];
        $p_remove_all_path = $p_params['remove_all_path'];
        // ----- Check the path
        if (($p_path == "") || ((substr($p_path, 0, 1) != "/") && (substr($p_path, 0, 3) != "../") && (substr($p_path, 1, 2) != ":/"))) $p_path = "./".$p_path;
        // ----- Reduce the path last (and duplicated) '/'
        if (($p_path != "./") && ($p_path != "/")) {
            // ----- Look for the path end '/'
            while (substr($p_path, -1) == "/") {
                $p_path = substr($p_path, 0, strlen($p_path) -1);
            }
        }
        // ----- Look for path to remove format (should end by /)
        if (($p_remove_path != "") && (substr($p_remove_path, -1) != '/')) {
            $p_remove_path.= '/';
        }
        $p_remove_path_size = strlen($p_remove_path);
        // ----- Open the zip file
        if (($v_result = $this->_openFd('rb')) != 1) {
            return $v_result;
        }
        // ----- Read the central directory informations
        $v_central_dir = array();
        if (($v_result = $this->_readEndCentralDir($v_central_dir)) != 1) {
            // ----- Close the zip file
            $this->_closeFd();
            return $v_result;
        }
        // ----- Start at beginning of Central Dir
        $v_pos_entry = $v_central_dir['offset'];
        // ----- Read each entry
        $j_start = 0;
        for ($i = 0, $v_nb_extracted = 0 ; $i < $v_central_dir['entries'] ; $i++) {
            // ----- Read next Central dir entry
            @rewind($this->_zip_fd);
            if (@fseek($this->_zip_fd, $v_pos_entry)) {
                $this->_closeFd();
                $this->_errorLog(AK_ZIP_ERR_INVALID_AK_ZIP, 'Invalid archive size');
                return AkZip::errorCode();
            }
            // ----- Read the file header
            $v_header = array();
            if (($v_result = $this->_readCentralFileHeader($v_header)) != 1) {
                $this->_closeFd();
                return $v_result;
            }
            // ----- Store the index
            $v_header['index'] = $i;
            // ----- Store the file position
            $v_pos_entry = ftell($this->_zip_fd);
            // ----- Look for the specific extract rules
            $v_extract = false;
            // ----- Look for extract by name rule
            if ((isset($p_params[AK_ZIP_PARAM_BY_NAME])) && ($p_params[AK_ZIP_PARAM_BY_NAME] != 0)) {
                // ----- Look if the filename is in the list
                for ($j = 0 ; ($j < sizeof($p_params[AK_ZIP_PARAM_BY_NAME])) && (!$v_extract) ; $j++) {
                    // ----- Look for a directory
                    if (substr($p_params[AK_ZIP_PARAM_BY_NAME][$j], -1) == "/") {
                        // ----- Look if the directory is in the filename path
                        if ((strlen($v_header['stored_filename']) > strlen($p_params[AK_ZIP_PARAM_BY_NAME][$j])) && (substr($v_header['stored_filename'], 0, strlen($p_params[AK_ZIP_PARAM_BY_NAME][$j])) == $p_params[AK_ZIP_PARAM_BY_NAME][$j])) {
                            $v_extract = true;
                        }
                    }
                    // ----- Look for a filename
                    elseif ($v_header['stored_filename'] == $p_params[AK_ZIP_PARAM_BY_NAME][$j]) {
                        $v_extract = true;
                    }
                }
            }
            // ----- Look for extract by ereg rule
            else if ((isset($p_params[AK_ZIP_PARAM_BY_EREG])) && ($p_params[AK_ZIP_PARAM_BY_EREG] != "")) {
                if (ereg($p_params[AK_ZIP_PARAM_BY_EREG], $v_header['stored_filename'])) {
                    $v_extract = true;
                }
            }
            // ----- Look for extract by preg rule
            else if ((isset($p_params[AK_ZIP_PARAM_BY_PREG])) && ($p_params[AK_ZIP_PARAM_BY_PREG] != "")) {
                if (preg_match($p_params[AK_ZIP_PARAM_BY_PREG], $v_header['stored_filename'])) {
                    $v_extract = true;
                }
            }
            // ----- Look for extract by index rule
            else if ((isset($p_params[AK_ZIP_PARAM_BY_INDEX])) && ($p_params[AK_ZIP_PARAM_BY_INDEX] != 0)) {
                // ----- Look if the index is in the list
                for ($j = $j_start ; ($j < sizeof($p_params[AK_ZIP_PARAM_BY_INDEX])) && (!$v_extract) ; $j++) {
                    if (($i >= $p_params[AK_ZIP_PARAM_BY_INDEX][$j]['start']) && ($i <= $p_params[AK_ZIP_PARAM_BY_INDEX][$j]['end'])) {
                        $v_extract = true;
                    }
                    if ($i >= $p_params[AK_ZIP_PARAM_BY_INDEX][$j]['end']) {
                        $j_start = $j+1;
                    }
                    if ($p_params[AK_ZIP_PARAM_BY_INDEX][$j]['start'] > $i) {
                        break;
                    }
                }
            }
            // ----- Look for no rule, which means extract all the archive
            else {
                $v_extract = true;
            }
            // ----- Look for real extraction
            if ($v_extract) {
                // ----- Go to the file position
                @rewind($this->_zip_fd);
                if (@fseek($this->_zip_fd, $v_header['offset'])) {
                    // ----- Close the zip file
                    $this->_closeFd();
                    // ----- Error log
                    $this->_errorLog(AK_ZIP_ERR_INVALID_AK_ZIP, 'Invalid archive size');
                    // ----- Return
                    return AkZip::errorCode();
                }
                // ----- Look for extraction as string
                if ($p_params[AK_ZIP_PARAM_EXTRACT_AS_STRING]) {
                    // ----- Extracting the file
                    if (($v_result = $this->_extractFileAsString($v_header, $v_string)) != 1) {
                        // ----- Close the zip file
                        $this->_closeFd();
                        return $v_result;
                    }
                    // ----- Get the only interesting attributes
                    if (($v_result = $this->_convertHeader2FileInfo($v_header, $p_file_list[$v_nb_extracted])) != 1) {
                        // ----- Close the zip file
                        $this->_closeFd();
                        return $v_result;
                    }
                    // ----- Set the file content
                    $p_file_list[$v_nb_extracted]['content'] = $v_string;
                    // ----- Next extracted file
                    $v_nb_extracted++;
                } else {
                    // ----- Extracting the file
                    if (($v_result = $this->_extractFile($v_header, $p_path, $p_remove_path, $p_remove_all_path, $p_params)) != 1) {
                        // ----- Close the zip file
                        $this->_closeFd();
                        return $v_result;
                    }
                    // ----- Get the only interesting attributes
                    if (($v_result = $this->_convertHeader2FileInfo($v_header, $p_file_list[$v_nb_extracted++])) != 1) {
                        // ----- Close the zip file
                        $this->_closeFd();
                        return $v_result;
                    }
                }
            }
        }
        // ----- Close the zip file
        $this->_closeFd();
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _extractFile()
    // Description :
    // Parameters :
    // Return Values :
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_extractFile()
     *
     * { Description }
     *
     */
    
    function _extractFile(&$p_entry, $p_path, $p_remove_path, $p_remove_all_path, &$p_params) 
    {
        $v_result = 1;
        // ----- Read the file header
        if (($v_result = $this->_readFileHeader($v_header)) != 1) {
            // ----- Return
            return $v_result;
        }
        // ----- Check that the file header is coherent with $p_entry info
        // TBC
        // ----- Look for all path to remove
        if ($p_remove_all_path == true) {
            // ----- Get the basename of the path
            $p_entry['filename'] = basename($p_entry['filename']);
        }
        // ----- Look for path to remove
        else if ($p_remove_path != "") {
            //if (strcmp($p_remove_path, $p_entry['filename'])==0)
            if ($this->_tool_PathInclusion($p_remove_path, $p_entry['filename']) == 2) {
                // ----- Change the file status
                $p_entry['status'] = "filtered";
                // ----- Return
                return $v_result;
            }
            $p_remove_path_size = strlen($p_remove_path);
            if (substr($p_entry['filename'], 0, $p_remove_path_size) == $p_remove_path) {
                // ----- Remove the path
                $p_entry['filename'] = substr($p_entry['filename'], $p_remove_path_size);
            }
        }
        // ----- Add the path
        if ($p_path != '') {
            $p_entry['filename'] = $p_path."/".$p_entry['filename'];
        }
        // ----- Look for pre-extract callback
        if ((isset($p_params[AK_ZIP_PARAM_PRE_EXTRACT])) && ($p_params[AK_ZIP_PARAM_PRE_EXTRACT] != '')) {
            // ----- Generate a local information
            $v_local_header = array();
            $this->_convertHeader2FileInfo($p_entry, $v_local_header);
            // ----- Call the callback
            // Here I do not use call_user_func() because I need to send a reference to the
            // header.
            eval('$v_result = '.$p_params[AK_ZIP_PARAM_PRE_EXTRACT].'(AK_ZIP_PARAM_PRE_EXTRACT, $v_local_header);');
            if ($v_result == 0) {
                // ----- Change the file status
                $p_entry['status'] = "skipped";
                $v_result = 1;
            }
            // ----- Update the informations
            // Only some fields can be modified
            $p_entry['filename'] = $v_local_header['filename'];
        }
        // ----- Trace
        // ----- Look if extraction should be done
        if ($p_entry['status'] == 'ok') {
            // ----- Look for specific actions while the file exist
            if (file_exists($p_entry['filename'])) {
                // ----- Look if file is a directory
                if (is_dir($p_entry['filename'])) {
                    // ----- Change the file status
                    $p_entry['status'] = "already_a_directory";
                    // ----- Return
                    //return $v_result;
                    
                }
                // ----- Look if file is write protected
                else if (!is_writeable($p_entry['filename'])) {
                    // ----- Change the file status
                    $p_entry['status'] = "write_protected";
                    // ----- Return
                    //return $v_result;
                    
                }
                // ----- Look if the extracted file is older
                else if (filemtime($p_entry['filename']) > $p_entry['mtime']) {
                    // ----- Change the file status
                    $p_entry['status'] = "newer_exist";
                    // ----- Return
                    //return $v_result;
                    
                }
            }
            // ----- Check the directory availability and create it if necessary
            else {
                if ((($p_entry['external']&0x00000010) == 0x00000010) || (substr($p_entry['filename'], -1) == '/')) $v_dir_to_check = $p_entry['filename'];
                else if (!strstr($p_entry['filename'], "/")) $v_dir_to_check = "";
                else $v_dir_to_check = dirname($p_entry['filename']);
                if (($v_result = $this->_dirCheck($v_dir_to_check, (($p_entry['external']&0x00000010) == 0x00000010))) != 1) {
                    // ----- Change the file status
                    $p_entry['status'] = "path_creation_fail";
                    // ----- Return
                    //return $v_result;
                    $v_result = 1;
                }
            }
        }
        // ----- Look if extraction should be done
        if ($p_entry['status'] == 'ok') {
            // ----- Do the extraction (if not a folder)
            if (!(($p_entry['external']&0x00000010) == 0x00000010)) {
                // ----- Look for not compressed file
                if ($p_entry['compressed_size'] == $p_entry['size']) {
                    // ----- Opening destination file
                    if (($v_dest_file = @fopen($p_entry['filename'], 'wb')) == 0) {
                        // ----- Change the file status
                        $p_entry['status'] = "write_error";
                        // ----- Return
                        return $v_result;
                    }
                    // ----- Read the file by AK_ZIP_READ_BLOCK_SIZE octets blocks
                    $v_size = $p_entry['compressed_size'];
                    while ($v_size != 0) {
                        $v_read_size = ($v_size < AK_ZIP_READ_BLOCK_SIZE ? $v_size : AK_ZIP_READ_BLOCK_SIZE);
                        $v_buffer = fread($this->_zip_fd, $v_read_size);
                        $v_binary_data = pack('a'.$v_read_size, $v_buffer);
                        @fwrite($v_dest_file, $v_binary_data, $v_read_size);
                        $v_size-= $v_read_size;
                    }
                    // ----- Closing the destination file
                    fclose($v_dest_file);
                    // ----- Change the file mtime
                    touch($p_entry['filename'], $p_entry['mtime']);
                } else {
                    // ----- Trace
                    // ----- Opening destination file
                    if (($v_dest_file = @fopen($p_entry['filename'], 'wb')) == 0) {
                        // ----- Change the file status
                        $p_entry['status'] = "write_error";
                        return $v_result;
                    }
                    // ----- Read the compressed file in a buffer (one shot)
                    $v_buffer = @fread($this->_zip_fd, $p_entry['compressed_size']);
                    // ----- Decompress the file
                    $v_file_content = gzinflate($v_buffer);
                    unset($v_buffer);
                    // ----- Write the uncompressed data
                    @fwrite($v_dest_file, $v_file_content, $p_entry['size']);
                    unset($v_file_content);
                    // ----- Closing the destination file
                    @fclose($v_dest_file);
                    // ----- Change the file mtime
                    touch($p_entry['filename'], $p_entry['mtime']);
                }
                // ----- Look for chmod option
                if ((isset($p_params[AK_ZIP_PARAM_SET_CHMOD])) && ($p_params[AK_ZIP_PARAM_SET_CHMOD] != 0)) {
                    // ----- Change the mode of the file
                    chmod($p_entry['filename'], $p_params[AK_ZIP_PARAM_SET_CHMOD]);
                }
            }
        }
        // ----- Look for post-extract callback
        if ((isset($p_params[AK_ZIP_PARAM_POST_EXTRACT])) && ($p_params[AK_ZIP_PARAM_POST_EXTRACT] != '')) {
            // ----- Generate a local information
            $v_local_header = array();
            $this->_convertHeader2FileInfo($p_entry, $v_local_header);
            // ----- Call the callback
            // Here I do not use call_user_func() because I need to send a reference to the
            // header.
            eval('$v_result = '.$p_params[AK_ZIP_PARAM_POST_EXTRACT].'(AK_ZIP_PARAM_POST_EXTRACT, $v_local_header);');
        }
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _extractFileAsString()
    // Description :
    // Parameters :
    // Return Values :
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_extractFileAsString()
     *
     * { Description }
     *
     */
    
    function _extractFileAsString(&$p_entry, &$p_string) 
    {
        $v_result = 1;
        // ----- Read the file header
        $v_header = array();
        if (($v_result = $this->_readFileHeader($v_header)) != 1) {
            // ----- Return
            return $v_result;
        }
        // ----- Check that the file header is coherent with $p_entry info
        // TBC
        // ----- Trace
        // ----- Do the extraction (if not a folder)
        if (!(($p_entry['external']&0x00000010) == 0x00000010)) {
            // ----- Look for not compressed file
            if ($p_entry['compressed_size'] == $p_entry['size']) {
                // ----- Trace
                // ----- Reading the file
                $p_string = fread($this->_zip_fd, $p_entry['compressed_size']);
            } else {
                // ----- Trace
                // ----- Reading the file
                $v_data = fread($this->_zip_fd, $p_entry['compressed_size']);
                // ----- Decompress the file
                $p_string = gzinflate($v_data);
            }
            // ----- Trace
            
        } else {
            // TBC : error : can not extract a folder in a string
            
        }
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _readFileHeader()
    // Description :
    // Parameters :
    // Return Values :
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_readFileHeader()
     *
     * { Description }
     *
     */
    
    function _readFileHeader(&$p_header) 
    {
        $v_result = 1;
        // ----- Read the 4 bytes signature
        $v_binary_data = @fread($this->_zip_fd, 4);
        $v_data = unpack('Vid', $v_binary_data);
        // ----- Check signature
        if ($v_data['id'] != 0x04034b50) {
            // ----- Error log
            $this->_errorLog(AK_ZIP_ERR_BAD_FORMAT, 'Invalid archive structure');
            // ----- Return
            return AkZip::errorCode();
        }
        // ----- Read the first 42 bytes of the header
        $v_binary_data = fread($this->_zip_fd, 26);
        // ----- Look for invalid block size
        if (strlen($v_binary_data) != 26) {
            $p_header['filename'] = "";
            $p_header['status'] = "invalid_header";
            // ----- Error log
            $this->_errorLog(AK_ZIP_ERR_BAD_FORMAT, "Invalid block size : ".strlen($v_binary_data));
            // ----- Return
            return AkZip::errorCode();
        }
        // ----- Extract the values
        $v_data = unpack('vversion/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len', $v_binary_data);
        // ----- Get filename
        $p_header['filename'] = fread($this->_zip_fd, $v_data['filename_len']);
        // ----- Get extra_fields
        if ($v_data['extra_len'] != 0) {
            $p_header['extra'] = fread($this->_zip_fd, $v_data['extra_len']);
        } else {
            $p_header['extra'] = '';
        }
        // ----- Extract properties
        $p_header['compression'] = $v_data['compression'];
        $p_header['size'] = $v_data['size'];
        $p_header['compressed_size'] = $v_data['compressed_size'];
        $p_header['crc'] = $v_data['crc'];
        $p_header['flag'] = $v_data['flag'];
        // ----- Recuperate date in UNIX format
        $p_header['mdate'] = $v_data['mdate'];
        $p_header['mtime'] = $v_data['mtime'];
        if ($p_header['mdate'] && $p_header['mtime']) {
            // ----- Extract time
            $v_hour = ($p_header['mtime']&0xF800) >>11;
            $v_minute = ($p_header['mtime']&0x07E0) >>5;
            $v_seconde = ($p_header['mtime']&0x001F) *2;
            // ----- Extract date
            $v_year = (($p_header['mdate']&0xFE00) >>9) +1980;
            $v_month = ($p_header['mdate']&0x01E0) >>5;
            $v_day = $p_header['mdate']&0x001F;
            // ----- Get UNIX date format
            $p_header['mtime'] = mktime($v_hour, $v_minute, $v_seconde, $v_month, $v_day, $v_year);
        } else {
            $p_header['mtime'] = time();
        }
        // ----- Other informations
        // TBC
        //for(reset($v_data); $key = key($v_data); next($v_data)) {
        //}
        // ----- Set the stored filename
        $p_header['stored_filename'] = $p_header['filename'];
        // ----- Set the status field
        $p_header['status'] = "ok";
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _readCentralFileHeader()
    // Description :
    // Parameters :
    // Return Values :
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_readCentralFileHeader()
     *
     * { Description }
     *
     */
    
    function _readCentralFileHeader(&$p_header) 
    {
        $v_result = 1;
        // ----- Read the 4 bytes signature
        $v_binary_data = @fread($this->_zip_fd, 4);
        $v_data = unpack('Vid', $v_binary_data);
        // ----- Check signature
        if ($v_data['id'] != 0x02014b50) {
            // ----- Error log
            $this->_errorLog(AK_ZIP_ERR_BAD_FORMAT, 'Invalid archive structure');
            // ----- Return
            return AkZip::errorCode();
        }
        // ----- Read the first 42 bytes of the header
        $v_binary_data = fread($this->_zip_fd, 42);
        // ----- Look for invalid block size
        if (strlen($v_binary_data) != 42) {
            $p_header['filename'] = "";
            $p_header['status'] = "invalid_header";
            // ----- Error log
            $this->_errorLog(AK_ZIP_ERR_BAD_FORMAT, "Invalid block size : ".strlen($v_binary_data));
            // ----- Return
            return AkZip::errorCode();
        }
        // ----- Extract the values
        $p_header = unpack('vversion/vversion_extracted/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len/vcomment_len/vdisk/vinternal/Vexternal/Voffset', $v_binary_data);
        // ----- Get filename
        if ($p_header['filename_len'] != 0) $p_header['filename'] = fread($this->_zip_fd, $p_header['filename_len']);
        else $p_header['filename'] = '';
        // ----- Get extra
        if ($p_header['extra_len'] != 0) $p_header['extra'] = fread($this->_zip_fd, $p_header['extra_len']);
        else $p_header['extra'] = '';
        // ----- Get comment
        if ($p_header['comment_len'] != 0) $p_header['comment'] = fread($this->_zip_fd, $p_header['comment_len']);
        else $p_header['comment'] = '';
        // ----- Extract properties
        // ----- Recuperate date in UNIX format
        if ($p_header['mdate'] && $p_header['mtime']) {
            // ----- Extract time
            $v_hour = ($p_header['mtime']&0xF800) >>11;
            $v_minute = ($p_header['mtime']&0x07E0) >>5;
            $v_seconde = ($p_header['mtime']&0x001F) *2;
            // ----- Extract date
            $v_year = (($p_header['mdate']&0xFE00) >>9) +1980;
            $v_month = ($p_header['mdate']&0x01E0) >>5;
            $v_day = $p_header['mdate']&0x001F;
            // ----- Get UNIX date format
            $p_header['mtime'] = mktime($v_hour, $v_minute, $v_seconde, $v_month, $v_day, $v_year);
        } else {
            $p_header['mtime'] = time();
        }
        // ----- Set the stored filename
        $p_header['stored_filename'] = $p_header['filename'];
        // ----- Set default status to ok
        $p_header['status'] = 'ok';
        // ----- Look if it is a directory
        if (substr($p_header['filename'], -1) == '/') {
            $p_header['external'] = 0x41FF0010;
        }
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _readEndCentralDir()
    // Description :
    // Parameters :
    // Return Values :
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_readEndCentralDir()
     *
     * { Description }
     *
     */
    
    function _readEndCentralDir(&$p_central_dir) 
    {
        $v_result = 1;
        // ----- Go to the end of the zip file
        $v_size = filesize($this->_zipname);
        @fseek($this->_zip_fd, $v_size);
        if (@ftell($this->_zip_fd) != $v_size) {
            $this->_errorLog(AK_ZIP_ERR_BAD_FORMAT, 'Unable to go to the end of the archive \''.$this->_zipname.'\'');
            return AkZip::errorCode();
        }
        // ----- First try : look if this is an archive with no commentaries
        // (most of the time)
        // in this case the end of central dir is at 22 bytes of the file end
        $v_found = 0;
        if ($v_size > 26) {
            @fseek($this->_zip_fd, $v_size-22);
            if (($v_pos = @ftell($this->_zip_fd)) != ($v_size-22)) {
                $this->_errorLog(AK_ZIP_ERR_BAD_FORMAT, 'Unable to seek back to the middle of the archive \''.$this->_zipname.'\'');
                return AkZip::errorCode();
            }
            // ----- Read for bytes
            $v_binary_data = @fread($this->_zip_fd, 4);
            $v_data = unpack('Vid', $v_binary_data);
            // ----- Check signature
            if ($v_data['id'] == 0x06054b50) {
                $v_found = 1;
            }
            $v_pos = ftell($this->_zip_fd);
        }
        // ----- Go back to the maximum possible size of the Central Dir End Record
        if (!$v_found) {
            $v_maximum_size = 65557; // 0xFFFF + 22;
            if ($v_maximum_size > $v_size) $v_maximum_size = $v_size;
            @fseek($this->_zip_fd, $v_size-$v_maximum_size);
            if (@ftell($this->_zip_fd) != ($v_size-$v_maximum_size)) {
                $this->_errorLog(AK_ZIP_ERR_BAD_FORMAT, 'Unable to seek back to the middle of the archive \''.$this->_zipname.'\'');
                return AkZip::errorCode();
            }
            // ----- Read byte per byte in order to find the signature
            $v_pos = ftell($this->_zip_fd);
            $v_bytes = 0x00000000;
            while ($v_pos < $v_size) {
                // ----- Read a byte
                $v_byte = @fread($this->_zip_fd, 1);
                // -----  Add the byte
                $v_bytes = ($v_bytes<<8) |Ord($v_byte);
                // ----- Compare the bytes
                if ($v_bytes == 0x504b0506) {
                    $v_pos++;
                    break;
                }
                $v_pos++;
            }
            // ----- Look if not found end of central dir
            if ($v_pos == $v_size) {
                $this->_errorLog(AK_ZIP_ERR_BAD_FORMAT, "Unable to find End of Central Dir Record signature");
                return AkZip::errorCode();
            }
        }
        // ----- Read the first 18 bytes of the header
        $v_binary_data = fread($this->_zip_fd, 18);
        // ----- Look for invalid block size
        if (strlen($v_binary_data) != 18) {
            $this->_errorLog(AK_ZIP_ERR_BAD_FORMAT, "Invalid End of Central Dir Record size : ".strlen($v_binary_data));
            return AkZip::errorCode();
        }
        // ----- Extract the values
        $v_data = unpack('vdisk/vdisk_start/vdisk_entries/ventries/Vsize/Voffset/vcomment_size', $v_binary_data);
        // ----- Check the global size
        if (($v_pos+$v_data['comment_size']+18) != $v_size) {
            $this->_errorLog(AK_ZIP_ERR_BAD_FORMAT, "Fail to find the right signature");
            return AkZip::errorCode();
        }
        // ----- Get comment
        if ($v_data['comment_size'] != 0) $p_central_dir['comment'] = fread($this->_zip_fd, $v_data['comment_size']);
        else $p_central_dir['comment'] = '';
        $p_central_dir['entries'] = $v_data['entries'];
        $p_central_dir['disk_entries'] = $v_data['disk_entries'];
        $p_central_dir['offset'] = $v_data['offset'];
        $p_central_dir['size'] = $v_data['size'];
        $p_central_dir['disk'] = $v_data['disk'];
        $p_central_dir['disk_start'] = $v_data['disk_start'];
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _deleteByRule()
    // Description :
    // Parameters :
    // Return Values :
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_deleteByRule()
     *
     * { Description }
     *
     */
    
    function _deleteByRule(&$p_result_list, &$p_params) 
    {
        $v_result = 1;
        $v_list_detail = array();
        // ----- Open the zip file
        if (($v_result = $this->_openFd('rb')) != 1) {
            // ----- Return
            return $v_result;
        }
        // ----- Read the central directory informations
        $v_central_dir = array();
        if (($v_result = $this->_readEndCentralDir($v_central_dir)) != 1) {
            $this->_closeFd();
            return $v_result;
        }
        // ----- Go to beginning of File
        @rewind($this->_zip_fd);
        // ----- Scan all the files
        // ----- Start at beginning of Central Dir
        $v_pos_entry = $v_central_dir['offset'];
        @rewind($this->_zip_fd);
        if (@fseek($this->_zip_fd, $v_pos_entry)) {
            // ----- Clean
            $this->_closeFd();
            $this->_errorLog(AK_ZIP_ERR_INVALID_AK_ZIP, 'Invalid archive size');
            return AkZip::errorCode();
        }
        // ----- Read each entry
        $v_header_list = array();
        $j_start = 0;
        for ($i = 0, $v_nb_extracted = 0 ; $i < $v_central_dir['entries'] ; $i++) {
            // ----- Read the file header
            $v_header_list[$v_nb_extracted] = array();
            $v_result = $this->_readCentralFileHeader($v_header_list[$v_nb_extracted]);
            if ($v_result != 1) {
                // ----- Clean
                $this->_closeFd();
                return $v_result;
            }
            // ----- Store the index
            $v_header_list[$v_nb_extracted]['index'] = $i;
            // ----- Look for the specific extract rules
            $v_found = false;
            // ----- Look for extract by name rule
            if ((isset($p_params[AK_ZIP_PARAM_BY_NAME])) && ($p_params[AK_ZIP_PARAM_BY_NAME] != 0)) {
                // ----- Look if the filename is in the list
                for ($j = 0 ; ($j < sizeof($p_params[AK_ZIP_PARAM_BY_NAME])) && (!$v_found) ; $j++) {
                    // ----- Look for a directory
                    if (substr($p_params[AK_ZIP_PARAM_BY_NAME][$j], -1) == "/") {
                        // ----- Look if the directory is in the filename path
                        if ((strlen($v_header_list[$v_nb_extracted]['stored_filename']) > strlen($p_params[AK_ZIP_PARAM_BY_NAME][$j])) && (substr($v_header_list[$v_nb_extracted]['stored_filename'], 0, strlen($p_params[AK_ZIP_PARAM_BY_NAME][$j])) == $p_params[AK_ZIP_PARAM_BY_NAME][$j])) {
                            $v_found = true;
                        } elseif ((($v_header_list[$v_nb_extracted]['external']&0x00000010) == 0x00000010) /* Indicates a folder */ && ($v_header_list[$v_nb_extracted]['stored_filename'].'/' == $p_params[AK_ZIP_PARAM_BY_NAME][$j])) {
                            $v_found = true;
                        }
                    }
                    // ----- Look for a filename
                    elseif ($v_header_list[$v_nb_extracted]['stored_filename'] == $p_params[AK_ZIP_PARAM_BY_NAME][$j]) {
                        $v_found = true;
                    }
                }
            }
            // ----- Look for extract by ereg rule
            else if ((isset($p_params[AK_ZIP_PARAM_BY_EREG])) && ($p_params[AK_ZIP_PARAM_BY_EREG] != "")) {
                if (ereg($p_params[AK_ZIP_PARAM_BY_EREG], $v_header_list[$v_nb_extracted]['stored_filename'])) {
                    $v_found = true;
                }
            }
            // ----- Look for extract by preg rule
            else if ((isset($p_params[AK_ZIP_PARAM_BY_PREG])) && ($p_params[AK_ZIP_PARAM_BY_PREG] != "")) {
                if (preg_match($p_params[AK_ZIP_PARAM_BY_PREG], $v_header_list[$v_nb_extracted]['stored_filename'])) {
                    $v_found = true;
                }
            }
            // ----- Look for extract by index rule
            else if ((isset($p_params[AK_ZIP_PARAM_BY_INDEX])) && ($p_params[AK_ZIP_PARAM_BY_INDEX] != 0)) {
                // ----- Look if the index is in the list
                for ($j = $j_start ; ($j < sizeof($p_params[AK_ZIP_PARAM_BY_INDEX])) && (!$v_found) ; $j++) {
                    if (($i >= $p_params[AK_ZIP_PARAM_BY_INDEX][$j]['start']) && ($i <= $p_params[AK_ZIP_PARAM_BY_INDEX][$j]['end'])) {
                        $v_found = true;
                    }
                    if ($i >= $p_params[AK_ZIP_PARAM_BY_INDEX][$j]['end']) {
                        $j_start = $j+1;
                    }
                    if ($p_params[AK_ZIP_PARAM_BY_INDEX][$j]['start'] > $i) {
                        break;
                    }
                }
            }
            // ----- Look for deletion
            if ($v_found) {
                unset($v_header_list[$v_nb_extracted]);
            } else {
                $v_nb_extracted++;
            }
        }
        // ----- Look if something need to be deleted
        if ($v_nb_extracted > 0) {
            // ----- Creates a temporay file
            $v_zip_temp_name = AK_ZIP_TEMPORARY_DIR.uniqid('archive_zip-') .'.tmp';
            // ----- Creates a temporary zip archive
            $v_temp_zip = new AkZip($v_zip_temp_name);
            // ----- Open the temporary zip file in write mode
            if (($v_result = $v_temp_zip->_openFd('wb')) != 1) {
                $this->_closeFd();
                // ----- Return
                return $v_result;
            }
            // ----- Look which file need to be kept
            for ($i = 0 ; $i < sizeof($v_header_list) ; $i++) {
                // ----- Calculate the position of the header
                @rewind($this->_zip_fd);
                if (@fseek($this->_zip_fd, $v_header_list[$i]['offset'])) {
                    // ----- Clean
                    $this->_closeFd();
                    $v_temp_zip->_closeFd();
                    @unlink($v_zip_temp_name);
                    $this->_errorLog(AK_ZIP_ERR_INVALID_AK_ZIP, 'Invalid archive size');
                    return AkZip::errorCode();
                }
                // ----- Read the file header
                if (($v_result = $this->_readFileHeader($v_header_list[$i])) != 1) {
                    // ----- Clean
                    $this->_closeFd();
                    $v_temp_zip->_closeFd();
                    @unlink($v_zip_temp_name);
                    return $v_result;
                }
                // ----- Write the file header
                $v_result = $v_temp_zip->_writeFileHeader($v_header_list[$i]);
                if ($v_result != 1) {
                    // ----- Clean
                    $this->_closeFd();
                    $v_temp_zip->_closeFd();
                    @unlink($v_zip_temp_name);
                    return $v_result;
                }
                // ----- Read/write the data block
                $v_result = $this->_tool_CopyBlock($this->_zip_fd, $v_temp_zip->_zip_fd, $v_header_list[$i]['compressed_size']);
                if ($v_result != 1) {
                    // ----- Clean
                    $this->_closeFd();
                    $v_temp_zip->_closeFd();
                    @unlink($v_zip_temp_name);
                    return $v_result;
                }
            }
            // ----- Store the offset of the central dir
            $v_offset = @ftell($v_temp_zip->_zip_fd);
            // ----- Re-Create the Central Dir files header
            for ($i = 0 ; $i < sizeof($v_header_list) ; $i++) {
                // ----- Create the file header
                $v_result = $v_temp_zip->_writeCentralFileHeader($v_header_list[$i]);
                if ($v_result != 1) {
                    // ----- Clean
                    $v_temp_zip->_closeFd();
                    $this->_closeFd();
                    @unlink($v_zip_temp_name);
                    return $v_result;
                }
                // ----- Transform the header to a 'usable' info
                $v_temp_zip->_convertHeader2FileInfo($v_header_list[$i], $p_result_list[$i]);
            }
            // ----- Zip file comment
            $v_comment = '';
            // ----- Calculate the size of the central header
            $v_size = @ftell($v_temp_zip->_zip_fd) -$v_offset;
            // ----- Create the central dir footer
            $v_result = $v_temp_zip->_writeCentralHeader(sizeof($v_header_list) , $v_size, $v_offset, $v_comment);
            if ($v_result != 1) {
                // ----- Clean
                unset($v_header_list);
                $v_temp_zip->_closeFd();
                $this->_closeFd();
                @unlink($v_zip_temp_name);
                return $v_result;
            }
            // ----- Close
            $v_temp_zip->_closeFd();
            $this->_closeFd();
            // ----- Delete the zip file
            // TBC : I should test the result ...
            @unlink($this->_zipname);
            // ----- Rename the temporary file
            // TBC : I should test the result ...
            //@rename($v_zip_temp_name, $this->_zipname);
            $this->_tool_Rename($v_zip_temp_name, $this->_zipname);
            // ----- Destroy the temporary archive
            unset($v_temp_zip);
        }
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _dirCheck()
    // Description :
    //   Check if a directory exists, if not it creates it and all the parents directory
    //   which may be useful.
    // Parameters :
    //   $p_dir : Directory path to check.
    // Return Values :
    //    1 : OK
    //   -1 : Unable to create directory
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_dirCheck()
     *
     * { Description }
     *
     * @param [type] $p_is_dir
     */
    
    function _dirCheck($p_dir, $p_is_dir = false) 
    {
        $v_result = 1;
        // ----- Remove the final '/'
        if (($p_is_dir) && (substr($p_dir, -1) == '/')) {
            $p_dir = substr($p_dir, 0, strlen($p_dir) -1);
        }
        // ----- Check the directory availability
        if ((is_dir($p_dir)) || ($p_dir == "")) {
            return 1;
        }
        // ----- Extract parent directory
        $p_parent_dir = dirname($p_dir);
        // ----- Just a check
        if ($p_parent_dir != $p_dir) {
            // ----- Look for parent directory
            if ($p_parent_dir != "") {
                if (($v_result = $this->_dirCheck($p_parent_dir)) != 1) {
                    return $v_result;
                }
            }
        }
        // ----- Create the directory
        if (!@mkdir($p_dir, 0777)) {
            $this->_errorLog(AK_ZIP_ERR_DIR_CREATE_FAIL, "Unable to create directory '$p_dir'");
            return AkZip::errorCode();
        }
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _merge()
    // Description :
    //   If $p_archive_to_add does not exist, the function exit with a success result.
    // Parameters :
    // Return Values :
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_merge()
     *
     * { Description }
     *
     */
    
    function _merge(&$p_archive_to_add) 
    {
        $v_result = 1;
        // ----- Look if the archive_to_add exists
        if (!is_file($p_archive_to_add->_zipname)) {
            // ----- Nothing to merge, so merge is a success
            return 1;
        }
        // ----- Look if the archive exists
        if (!is_file($this->_zipname)) {
            // ----- Do a duplicate
            $v_result = $this->_duplicate($p_archive_to_add->_zipname);
            return $v_result;
        }
        // ----- Open the zip file
        if (($v_result = $this->_openFd('rb')) != 1) {
            return $v_result;
        }
        // ----- Read the central directory informations
        $v_central_dir = array();
        if (($v_result = $this->_readEndCentralDir($v_central_dir)) != 1) {
            $this->_closeFd();
            return $v_result;
        }
        // ----- Go to beginning of File
        @rewind($this->_zip_fd);
        // ----- Open the archive_to_add file
        if (($v_result = $p_archive_to_add->_openFd('rb')) != 1) {
            $this->_closeFd();
            return $v_result;
        }
        // ----- Read the central directory informations
        $v_central_dir_to_add = array();
        $v_result = $p_archive_to_add->_readEndCentralDir($v_central_dir_to_add);
        if ($v_result != 1) {
            $this->_closeFd();
            $p_archive_to_add->_closeFd();
            return $v_result;
        }
        // ----- Go to beginning of File
        @rewind($p_archive_to_add->_zip_fd);
        // ----- Creates a temporay file
        $v_zip_temp_name = AK_ZIP_TEMPORARY_DIR.uniqid('archive_zip-') .'.tmp';
        // ----- Open the temporary file in write mode
        if (($v_zip_temp_fd = @fopen($v_zip_temp_name, 'wb')) == 0) {
            $this->_closeFd();
            $p_archive_to_add->_closeFd();
            $this->_errorLog(AK_ZIP_ERR_READ_OPEN_FAIL, 'Unable to open temporary file \''.$v_zip_temp_name.'\' in binary write mode');
            return AkZip::errorCode();
        }
        // ----- Copy the files from the archive to the temporary file
        // TBC : Here I should better append the file and go back to erase the
        // central dir
        $v_size = $v_central_dir['offset'];
        while ($v_size != 0) {
            $v_read_size = ($v_size < AK_ZIP_READ_BLOCK_SIZE ? $v_size : AK_ZIP_READ_BLOCK_SIZE);
            $v_buffer = fread($this->_zip_fd, $v_read_size);
            @fwrite($v_zip_temp_fd, $v_buffer, $v_read_size);
            $v_size-= $v_read_size;
        }
        // ----- Copy the files from the archive_to_add into the temporary file
        $v_size = $v_central_dir_to_add['offset'];
        while ($v_size != 0) {
            $v_read_size = ($v_size < AK_ZIP_READ_BLOCK_SIZE ? $v_size : AK_ZIP_READ_BLOCK_SIZE);
            $v_buffer = fread($p_archive_to_add->_zip_fd, $v_read_size);
            @fwrite($v_zip_temp_fd, $v_buffer, $v_read_size);
            $v_size-= $v_read_size;
        }
        // ----- Store the offset of the central dir
        $v_offset = @ftell($v_zip_temp_fd);
        // ----- Copy the block of file headers from the old archive
        $v_size = $v_central_dir['size'];
        while ($v_size != 0) {
            $v_read_size = ($v_size < AK_ZIP_READ_BLOCK_SIZE ? $v_size : AK_ZIP_READ_BLOCK_SIZE);
            $v_buffer = @fread($this->_zip_fd, $v_read_size);
            @fwrite($v_zip_temp_fd, $v_buffer, $v_read_size);
            $v_size-= $v_read_size;
        }
        // ----- Copy the block of file headers from the archive_to_add
        $v_size = $v_central_dir_to_add['size'];
        while ($v_size != 0) {
            $v_read_size = ($v_size < AK_ZIP_READ_BLOCK_SIZE ? $v_size : AK_ZIP_READ_BLOCK_SIZE);
            $v_buffer = @fread($p_archive_to_add->_zip_fd, $v_read_size);
            @fwrite($v_zip_temp_fd, $v_buffer, $v_read_size);
            $v_size-= $v_read_size;
        }
        // ----- Zip file comment
        // TBC : I should merge the two comments
        $v_comment = '';
        // ----- Calculate the size of the (new) central header
        $v_size = @ftell($v_zip_temp_fd) -$v_offset;
        // ----- Swap the file descriptor
        // Here is a trick : I swap the temporary fd with the zip fd, in order to use
        // the following methods on the temporary fil and not the real archive fd
        $v_swap = $this->_zip_fd;
        $this->_zip_fd = $v_zip_temp_fd;
        $v_zip_temp_fd = $v_swap;
        // ----- Create the central dir footer
        if (($v_result = $this->_writeCentralHeader($v_central_dir['entries']+$v_central_dir_to_add['entries'], $v_size, $v_offset, $v_comment)) != 1) {
            $this->_closeFd();
            $p_archive_to_add->_closeFd();
            @fclose($v_zip_temp_fd);
            $this->_zip_fd = null;
            // ----- Reset the file list
            unset($v_header_list);
            // ----- Return
            return $v_result;
        }
        // ----- Swap back the file descriptor
        $v_swap = $this->_zip_fd;
        $this->_zip_fd = $v_zip_temp_fd;
        $v_zip_temp_fd = $v_swap;
        // ----- Close
        $this->_closeFd();
        $p_archive_to_add->_closeFd();
        // ----- Close the temporary file
        @fclose($v_zip_temp_fd);
        // ----- Delete the zip file
        // TBC : I should test the result ...
        @unlink($this->_zipname);
        // ----- Rename the temporary file
        // TBC : I should test the result ...
        //@rename($v_zip_temp_name, $this->_zipname);
        $this->_tool_Rename($v_zip_temp_name, $this->_zipname);
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _duplicate()
    // Description :
    // Parameters :
    // Return Values :
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_duplicate()
     *
     * { Description }
     *
     */
    
    function _duplicate($p_archive_filename) 
    {
        $v_result = 1;
        // ----- Look if the $p_archive_filename exists
        if (!is_file($p_archive_filename)) {
            // ----- Nothing to duplicate, so duplicate is a success.
            $v_result = 1;
            // ----- Return
            return $v_result;
        }
        // ----- Open the zip file
        if (($v_result = $this->_openFd('wb')) != 1) {
            // ----- Return
            return $v_result;
        }
        // ----- Open the temporary file in write mode
        if (($v_zip_temp_fd = @fopen($p_archive_filename, 'rb')) == 0) {
            $this->_closeFd();
            $this->_errorLog(AK_ZIP_ERR_READ_OPEN_FAIL, 'Unable to open archive file \''.$p_archive_filename.'\' in binary write mode');
            return AkZip::errorCode();
        }
        // ----- Copy the files from the archive to the temporary file
        // TBC : Here I should better append the file and go back to erase the
        // central dir
        $v_size = filesize($p_archive_filename);
        while ($v_size != 0) {
            $v_read_size = ($v_size < AK_ZIP_READ_BLOCK_SIZE ? $v_size : AK_ZIP_READ_BLOCK_SIZE);
            $v_buffer = fread($v_zip_temp_fd, $v_read_size);
            @fwrite($this->_zip_fd, $v_buffer, $v_read_size);
            $v_size-= $v_read_size;
        }
        // ----- Close
        $this->_closeFd();
        // ----- Close the temporary file
        @fclose($v_zip_temp_fd);
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_check_parameters()
     *
     * { Description }
     *
     * @param integer $p_error_code
     * @param string $p_error_string
     */
    
    function _check_parameters(&$p_params, $p_default) 
    {
        // ----- Check that param is an array
        if (!is_array($p_params)) {
            $this->_errorLog(AK_ZIP_ERR_INVALID_PARAMETER, 'Unsupported parameter, waiting for an array');
            return AkZip::errorCode();
        }
        // ----- Check that all the params are valid
        for (reset($p_params) ; list($v_key, $v_value) = each($p_params) ;) {
            if (!isset($p_default[$v_key])) {
                $this->_errorLog(AK_ZIP_ERR_INVALID_PARAMETER, 'Unsupported parameter with key \''.$v_key.'\'');
                return AkZip::errorCode();
            }
        }
        // ----- Set the default values
        for (reset($p_default) ; list($v_key, $v_value) = each($p_default) ;) {
            if (!isset($p_params[$v_key])) {
                $p_params[$v_key] = $p_default[$v_key];
            }
        }
        // ----- Check specific parameters
        $v_callback_list = array(
            'callback_pre_add',
            'callback_post_add',
            'callback_pre_extract',
            'callback_post_extract'
        );
        for ($i = 0 ; $i < sizeof($v_callback_list) ; $i++) {
            $v_key = $v_callback_list[$i];
            if ((isset($p_params[$v_key])) && ($p_params[$v_key] != '')) {
                if (!function_exists($p_params[$v_key])) {
                    $this->_errorLog(AK_ZIP_ERR_INVALID_PARAM_VALUE, "Callback '".$p_params[$v_key]."()' is not an existing function for "."parameter '".$v_key."'");
                    return AkZip::errorCode();
                }
            }
        }
        return (1);
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _errorLog()
    // Description :
    // Parameters :
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_errorLog()
     *
     * { Description }
     *
     * @param integer $p_error_code
     * @param string $p_error_string
     */
    
    function _errorLog($p_error_code = 0, $p_error_string = '') 
    {
        $this->_error_code = $p_error_code;
        $this->_error_string = $p_error_string;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : _errorReset()
    // Description :
    // Parameters :
    // ---------------------------------------------------------------------------
    
    /**
     * AkZip::_errorReset()
     *
     * { Description }
     *
     */
    
    function _errorReset() 
    {
        $this->_error_code = 1;
        $this->_error_string = '';
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : $this->_tool_PathReduction()
    // Description :
    // Parameters :
    // Return Values :
    // ---------------------------------------------------------------------------
    
    /**
     * _tool_PathReduction()
     *
     * { Description }
     *
     */
    
    function _tool_PathReduction($p_dir) 
    {
        $v_result = "";
        // ----- Look for not empty path
        if ($p_dir != "") {
            // ----- Explode path by directory names
            $v_list = explode("/", $p_dir);
            // ----- Study directories from last to first
            for ($i = sizeof($v_list) -1 ; $i >= 0 ; $i--) {
                // ----- Look for current path
                if ($v_list[$i] == ".") {
                    // ----- Ignore this directory
                    // Should be the first $i=0, but no check is done
                    
                } else if ($v_list[$i] == "..") {
                    // ----- Ignore it and ignore the $i-1
                    $i--;
                } else if (($v_list[$i] == "") && ($i != (sizeof($v_list) -1)) && ($i != 0)) {
                    // ----- Ignore only the double '//' in path,
                    // but not the first and last '/'
                    
                } else {
                    $v_result = $v_list[$i].($i != (sizeof($v_list) -1) ? "/".$v_result : "");
                }
            }
        }
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : $this->_tool_PathInclusion()
    // Description :
    //   This function indicates if the path $p_path is under the $p_dir tree. Or,
    //   said in an other way, if the file or sub-dir $p_path is inside the dir
    //   $p_dir.
    //   The function indicates also if the path is exactly the same as the dir.
    //   This function supports path with duplicated '/' like '//', but does not
    //   support '.' or '..' statements.
    // Parameters :
    // Return Values :
    //   0 if $p_path is not inside directory $p_dir
    //   1 if $p_path is inside directory $p_dir
    //   2 if $p_path is exactly the same as $p_dir
    // ---------------------------------------------------------------------------
    
    /**
     * _tool_PathInclusion()
     *
     * { Description }
     *
     */
    
    function _tool_PathInclusion($p_dir, $p_path) 
    {
        $v_result = 1;
        // ----- Explode dir and path by directory separator
        $v_list_dir = explode("/", $p_dir);
        $v_list_dir_size = sizeof($v_list_dir);
        $v_list_path = explode("/", $p_path);
        $v_list_path_size = sizeof($v_list_path);
        // ----- Study directories paths
        $i = 0;
        $j = 0;
        while (($i < $v_list_dir_size) && ($j < $v_list_path_size) && ($v_result)) {
            // ----- Look for empty dir (path reduction)
            if ($v_list_dir[$i] == '') {
                $i++;
                continue;
            }
            if ($v_list_path[$j] == '') {
                $j++;
                continue;
            }
            // ----- Compare the items
            if (($v_list_dir[$i] != $v_list_path[$j]) && ($v_list_dir[$i] != '') && ($v_list_path[$j] != '')) {
                $v_result = 0;
            }
            // ----- Next items
            $i++;
            $j++;
        }
        // ----- Look if everything seems to be the same
        if ($v_result) {
            // ----- Skip all the empty items
            while (($j < $v_list_path_size) && ($v_list_path[$j] == '')) $j++;
            while (($i < $v_list_dir_size) && ($v_list_dir[$i] == '')) $i++;
            if (($i >= $v_list_dir_size) && ($j >= $v_list_path_size)) {
                // ----- There are exactly the same
                $v_result = 2;
            } else if ($i < $v_list_dir_size) {
                // ----- The path is shorter than the dir
                $v_result = 0;
            }
        }
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : $this->_tool_CopyBlock()
    // Description :
    // Parameters :
    //   $p_mode : read/write compression mode
    //             0 : src & dest normal
    //             1 : src gzip, dest normal
    //             2 : src normal, dest gzip
    //             3 : src & dest gzip
    // Return Values :
    // ---------------------------------------------------------------------------
    
    /**
     * _tool_CopyBlock()
     *
     * { Description }
     *
     * @param integer $p_mode
     */
    
    function _tool_CopyBlock($p_src, $p_dest, $p_size, $p_mode = 0) 
    {
        $v_result = 1;
        if ($p_mode == 0) {
            while ($p_size != 0) {
                $v_read_size = ($p_size < AK_ZIP_READ_BLOCK_SIZE ? $p_size : AK_ZIP_READ_BLOCK_SIZE);
                $v_buffer = @fread($p_src, $v_read_size);
                @fwrite($p_dest, $v_buffer, $v_read_size);
                $p_size-= $v_read_size;
            }
        } else if ($p_mode == 1) {
            while ($p_size != 0) {
                $v_read_size = ($p_size < AK_ZIP_READ_BLOCK_SIZE ? $p_size : AK_ZIP_READ_BLOCK_SIZE);
                $v_buffer = @gzread($p_src, $v_read_size);
                @fwrite($p_dest, $v_buffer, $v_read_size);
                $p_size-= $v_read_size;
            }
        } else if ($p_mode == 2) {
            while ($p_size != 0) {
                $v_read_size = ($p_size < AK_ZIP_READ_BLOCK_SIZE ? $p_size : AK_ZIP_READ_BLOCK_SIZE);
                $v_buffer = @fread($p_src, $v_read_size);
                @gzwrite($p_dest, $v_buffer, $v_read_size);
                $p_size-= $v_read_size;
            }
        } else if ($p_mode == 3) {
            while ($p_size != 0) {
                $v_read_size = ($p_size < AK_ZIP_READ_BLOCK_SIZE ? $p_size : AK_ZIP_READ_BLOCK_SIZE);
                $v_buffer = @gzread($p_src, $v_read_size);
                @gzwrite($p_dest, $v_buffer, $v_read_size);
                $p_size-= $v_read_size;
            }
        }
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : $this->_tool_Rename()
    // Description :
    //   This function tries to do a simple rename() function. If it fails, it
    //   tries to copy the $p_src file in a new $p_dest file and then unlink the
    //   first one.
    // Parameters :
    //   $p_src : Old filename
    //   $p_dest : New filename
    // Return Values :
    //   1 on success, 0 on failure.
    // ---------------------------------------------------------------------------
    
    /**
     * _tool_Rename()
     *
     * { Description }
     *
     */
    
    function _tool_Rename($p_src, $p_dest) 
    {
        $v_result = 1;
        // ----- Try to rename the files
        if (!@rename($p_src, $p_dest)) {
            // ----- Try to copy & unlink the src
            if (!@copy($p_src, $p_dest)) {
                $v_result = 0;
            } else if (!@unlink($p_src)) {
                $v_result = 0;
            }
        }
        // ----- Return
        return $v_result;
    }
    // ---------------------------------------------------------------------------
    // ---------------------------------------------------------------------------
    // Function : $this->_tool_TranslateWinPath()
    // Description :
    //   Translate windows path by replacing '\' by '/' and optionally removing
    //   drive letter.
    // Parameters :
    //   $p_path : path to translate.
    //   $p_remove_disk_letter : true | false
    // Return Values :
    //   The path translated.
    // ---------------------------------------------------------------------------
    
    /**
     * _tool_TranslateWinPath()
     *
     * { Description }
     *
     * @param [type] $p_remove_disk_letter
     */
    
    function _tool_TranslateWinPath($p_path, $p_remove_disk_letter = true) 
    {
        if (stristr(php_uname() , 'windows')) {
            // ----- Look for potential disk letter
            if (($p_remove_disk_letter) && (($v_position = strpos($p_path, ':')) != false)) {
                $p_path = substr($p_path, $v_position+1);
            }
            // ----- Change potential windows directory separator
            if ((strpos($p_path, '\\') > 0) || (substr($p_path, 0, 1) == '\\')) {
                $p_path = strtr($p_path, '\\', '/');
            }
        }
        return $p_path;
    }
    // ---------------------------------------------------------------------------
    
}
// End of class

?>
